瀏覽代碼

Fix optional parameters for async overloads

Bart De Smet 6 年之前
父節點
當前提交
9e72e4620f

+ 264 - 264
Ix.NET/Source/System.Linq.Async/System/Linq/AsyncEnumerable.AsyncOverloads.cs

@@ -11,63 +11,63 @@ namespace System.Linq
     partial class AsyncEnumerable
     {
 #if SUPPORT_FLAT_ASYNC_API
-        public static ValueTask<TSource> AggregateAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, TSource, ValueTask<TSource>> accumulator, CancellationToken cancellationToken) => AggregateAwaitAsyncCore<TSource>(source, accumulator, cancellationToken);
-        public static ValueTask<TAccumulate> AggregateAsync<TSource, TAccumulate>(this IAsyncEnumerable<TSource> source, TAccumulate seed, Func<TAccumulate, TSource, ValueTask<TAccumulate>> accumulator, CancellationToken cancellationToken) => AggregateAwaitAsyncCore<TSource, TAccumulate>(source, seed, accumulator, cancellationToken);
-        public static ValueTask<TResult> AggregateAsync<TSource, TAccumulate, TResult>(this IAsyncEnumerable<TSource> source, TAccumulate seed, Func<TAccumulate, TSource, ValueTask<TAccumulate>> accumulator, Func<TAccumulate, ValueTask<TResult>> resultSelector, CancellationToken cancellationToken) => AggregateAwaitAsyncCore<TSource, TAccumulate, TResult>(source, seed, accumulator, resultSelector, cancellationToken);
-        public static ValueTask<bool> AllAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => AllAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<bool> AnyAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => AnyAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<double?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double?>> selector, CancellationToken cancellationToken) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal?>> selector, CancellationToken cancellationToken) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int>> selector, CancellationToken cancellationToken) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long>> selector, CancellationToken cancellationToken) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float>> selector, CancellationToken cancellationToken) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double>> selector, CancellationToken cancellationToken) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal>> selector, CancellationToken cancellationToken) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int?>> selector, CancellationToken cancellationToken) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long?>> selector, CancellationToken cancellationToken) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float?>> selector, CancellationToken cancellationToken) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<int> CountAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => CountAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<TSource> FirstAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => FirstAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<TSource> FirstOrDefaultAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => FirstOrDefaultAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static Task ForEachAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, Task> action, CancellationToken cancellationToken) => ForEachAwaitAsyncCore<TSource>(source, action, cancellationToken);
-        public static Task ForEachAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, int, Task> action, CancellationToken cancellationToken) => ForEachAwaitAsyncCore<TSource>(source, action, cancellationToken);
+        public static ValueTask<TSource> AggregateAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, TSource, ValueTask<TSource>> accumulator, CancellationToken cancellationToken = default) => AggregateAwaitAsyncCore<TSource>(source, accumulator, cancellationToken);
+        public static ValueTask<TAccumulate> AggregateAsync<TSource, TAccumulate>(this IAsyncEnumerable<TSource> source, TAccumulate seed, Func<TAccumulate, TSource, ValueTask<TAccumulate>> accumulator, CancellationToken cancellationToken = default) => AggregateAwaitAsyncCore<TSource, TAccumulate>(source, seed, accumulator, cancellationToken);
+        public static ValueTask<TResult> AggregateAsync<TSource, TAccumulate, TResult>(this IAsyncEnumerable<TSource> source, TAccumulate seed, Func<TAccumulate, TSource, ValueTask<TAccumulate>> accumulator, Func<TAccumulate, ValueTask<TResult>> resultSelector, CancellationToken cancellationToken = default) => AggregateAwaitAsyncCore<TSource, TAccumulate, TResult>(source, seed, accumulator, resultSelector, cancellationToken);
+        public static ValueTask<bool> AllAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => AllAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<bool> AnyAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => AnyAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<double> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int>> selector, CancellationToken cancellationToken = default) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long>> selector, CancellationToken cancellationToken = default) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float>> selector, CancellationToken cancellationToken = default) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double>> selector, CancellationToken cancellationToken = default) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal>> selector, CancellationToken cancellationToken = default) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int?>> selector, CancellationToken cancellationToken = default) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long?>> selector, CancellationToken cancellationToken = default) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float?>> selector, CancellationToken cancellationToken = default) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double?>> selector, CancellationToken cancellationToken = default) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal?>> selector, CancellationToken cancellationToken = default) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<int> CountAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => CountAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<TSource> FirstAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => FirstAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<TSource> FirstOrDefaultAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => FirstOrDefaultAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static Task ForEachAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, Task> action, CancellationToken cancellationToken = default) => ForEachAwaitAsyncCore<TSource>(source, action, cancellationToken);
+        public static Task ForEachAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, int, Task> action, CancellationToken cancellationToken = default) => ForEachAwaitAsyncCore<TSource>(source, action, cancellationToken);
         public static IAsyncEnumerable<IAsyncGrouping<TKey, TSource>> GroupBy<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector) => GroupByAwaitCore<TSource, TKey>(source, keySelector);
-        public static IAsyncEnumerable<TResult> GroupBy<TSource, TKey, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TKey, IAsyncEnumerable<TSource>, ValueTask<TResult>> resultSelector) => GroupByAwaitCore<TSource, TKey, TResult>(source, keySelector, resultSelector);
         public static IAsyncEnumerable<IAsyncGrouping<TKey, TSource>> GroupBy<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer) => GroupByAwaitCore<TSource, TKey>(source, keySelector, comparer);
         public static IAsyncEnumerable<IAsyncGrouping<TKey, TElement>> GroupBy<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector) => GroupByAwaitCore<TSource, TKey, TElement>(source, keySelector, elementSelector);
-        public static IAsyncEnumerable<TResult> GroupBy<TSource, TKey, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TKey, IAsyncEnumerable<TSource>, ValueTask<TResult>> resultSelector, IEqualityComparer<TKey> comparer) => GroupByAwaitCore<TSource, TKey, TResult>(source, keySelector, resultSelector, comparer);
+        public static IAsyncEnumerable<TResult> GroupBy<TSource, TKey, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TKey, IAsyncEnumerable<TSource>, ValueTask<TResult>> resultSelector) => GroupByAwaitCore<TSource, TKey, TResult>(source, keySelector, resultSelector);
         public static IAsyncEnumerable<TResult> GroupBy<TSource, TKey, TElement, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, Func<TKey, IAsyncEnumerable<TElement>, ValueTask<TResult>> resultSelector) => GroupByAwaitCore<TSource, TKey, TElement, TResult>(source, keySelector, elementSelector, resultSelector);
         public static IAsyncEnumerable<IAsyncGrouping<TKey, TElement>> GroupBy<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, IEqualityComparer<TKey> comparer) => GroupByAwaitCore<TSource, TKey, TElement>(source, keySelector, elementSelector, comparer);
+        public static IAsyncEnumerable<TResult> GroupBy<TSource, TKey, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TKey, IAsyncEnumerable<TSource>, ValueTask<TResult>> resultSelector, IEqualityComparer<TKey> comparer) => GroupByAwaitCore<TSource, TKey, TResult>(source, keySelector, resultSelector, comparer);
         public static IAsyncEnumerable<TResult> GroupBy<TSource, TKey, TElement, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, Func<TKey, IAsyncEnumerable<TElement>, ValueTask<TResult>> resultSelector, IEqualityComparer<TKey> comparer) => GroupByAwaitCore<TSource, TKey, TElement, TResult>(source, keySelector, elementSelector, resultSelector, comparer);
         public static IAsyncEnumerable<TResult> GroupJoin<TOuter, TInner, TKey, TResult>(this IAsyncEnumerable<TOuter> outer, IAsyncEnumerable<TInner> inner, Func<TOuter, ValueTask<TKey>> outerKeySelector, Func<TInner, ValueTask<TKey>> innerKeySelector, Func<TOuter, IAsyncEnumerable<TInner>, ValueTask<TResult>> resultSelector) => GroupJoinAwaitCore<TOuter, TInner, TKey, TResult>(outer, inner, outerKeySelector, innerKeySelector, resultSelector);
         public static IAsyncEnumerable<TResult> GroupJoin<TOuter, TInner, TKey, TResult>(this IAsyncEnumerable<TOuter> outer, IAsyncEnumerable<TInner> inner, Func<TOuter, ValueTask<TKey>> outerKeySelector, Func<TInner, ValueTask<TKey>> innerKeySelector, Func<TOuter, IAsyncEnumerable<TInner>, ValueTask<TResult>> resultSelector, IEqualityComparer<TKey> comparer) => GroupJoinAwaitCore<TOuter, TInner, TKey, TResult>(outer, inner, outerKeySelector, innerKeySelector, resultSelector, comparer);
         public static IAsyncEnumerable<TResult> Join<TOuter, TInner, TKey, TResult>(this IAsyncEnumerable<TOuter> outer, IAsyncEnumerable<TInner> inner, Func<TOuter, ValueTask<TKey>> outerKeySelector, Func<TInner, ValueTask<TKey>> innerKeySelector, Func<TOuter, TInner, ValueTask<TResult>> resultSelector) => JoinAwaitCore<TOuter, TInner, TKey, TResult>(outer, inner, outerKeySelector, innerKeySelector, resultSelector);
         public static IAsyncEnumerable<TResult> Join<TOuter, TInner, TKey, TResult>(this IAsyncEnumerable<TOuter> outer, IAsyncEnumerable<TInner> inner, Func<TOuter, ValueTask<TKey>> outerKeySelector, Func<TInner, ValueTask<TKey>> innerKeySelector, Func<TOuter, TInner, ValueTask<TResult>> resultSelector, IEqualityComparer<TKey> comparer) => JoinAwaitCore<TOuter, TInner, TKey, TResult>(outer, inner, outerKeySelector, innerKeySelector, resultSelector, comparer);
-        public static ValueTask<TSource> LastAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => LastAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<TSource> LastOrDefaultAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => LastOrDefaultAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<long> LongCountAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => LongCountAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<int> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int>> selector, CancellationToken cancellationToken) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<int?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int?>> selector, CancellationToken cancellationToken) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<long> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long>> selector, CancellationToken cancellationToken) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<long?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long?>> selector, CancellationToken cancellationToken) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float>> selector, CancellationToken cancellationToken) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float?>> selector, CancellationToken cancellationToken) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double>> selector, CancellationToken cancellationToken) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double?>> selector, CancellationToken cancellationToken) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal>> selector, CancellationToken cancellationToken) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal?>> selector, CancellationToken cancellationToken) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<TResult> MaxAsync<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TResult>> selector, CancellationToken cancellationToken) => MaxAwaitAsyncCore<TSource, TResult>(source, selector, cancellationToken);
-        public static ValueTask<float> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float>> selector, CancellationToken cancellationToken) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float?>> selector, CancellationToken cancellationToken) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double>> selector, CancellationToken cancellationToken) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double?>> selector, CancellationToken cancellationToken) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal>> selector, CancellationToken cancellationToken) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal?>> selector, CancellationToken cancellationToken) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<int> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int>> selector, CancellationToken cancellationToken) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<int?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int?>> selector, CancellationToken cancellationToken) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<long> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long>> selector, CancellationToken cancellationToken) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<long?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long?>> selector, CancellationToken cancellationToken) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<TResult> MinAsync<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TResult>> selector, CancellationToken cancellationToken) => MinAwaitAsyncCore<TSource, TResult>(source, selector, cancellationToken);
+        public static ValueTask<TSource> LastAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => LastAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<TSource> LastOrDefaultAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => LastOrDefaultAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<long> LongCountAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => LongCountAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<long> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long>> selector, CancellationToken cancellationToken = default) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<long?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long?>> selector, CancellationToken cancellationToken = default) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float>> selector, CancellationToken cancellationToken = default) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float?>> selector, CancellationToken cancellationToken = default) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double>> selector, CancellationToken cancellationToken = default) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double?>> selector, CancellationToken cancellationToken = default) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal>> selector, CancellationToken cancellationToken = default) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal?>> selector, CancellationToken cancellationToken = default) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<TResult> MaxAsync<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TResult>> selector, CancellationToken cancellationToken = default) => MaxAwaitAsyncCore<TSource, TResult>(source, selector, cancellationToken);
+        public static ValueTask<int> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int>> selector, CancellationToken cancellationToken = default) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<int?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int?>> selector, CancellationToken cancellationToken = default) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double>> selector, CancellationToken cancellationToken = default) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double?>> selector, CancellationToken cancellationToken = default) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal>> selector, CancellationToken cancellationToken = default) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal?>> selector, CancellationToken cancellationToken = default) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<int> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int>> selector, CancellationToken cancellationToken = default) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<int?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int?>> selector, CancellationToken cancellationToken = default) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<long> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long>> selector, CancellationToken cancellationToken = default) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<long?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long?>> selector, CancellationToken cancellationToken = default) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float>> selector, CancellationToken cancellationToken = default) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float?>> selector, CancellationToken cancellationToken = default) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<TResult> MinAsync<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TResult>> selector, CancellationToken cancellationToken = default) => MinAwaitAsyncCore<TSource, TResult>(source, selector, cancellationToken);
         public static IOrderedAsyncEnumerable<TSource> OrderBy<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector) => OrderByAwaitCore<TSource, TKey>(source, keySelector);
         public static IOrderedAsyncEnumerable<TSource> OrderBy<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, IComparer<TKey> comparer) => OrderByAwaitCore<TSource, TKey>(source, keySelector, comparer);
         public static IOrderedAsyncEnumerable<TSource> OrderByDescending<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector) => OrderByDescendingAwaitCore<TSource, TKey>(source, keySelector);
@@ -78,96 +78,96 @@ namespace System.Linq
         public static IAsyncEnumerable<TResult> SelectMany<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, int, ValueTask<IAsyncEnumerable<TResult>>> selector) => SelectManyAwaitCore<TSource, TResult>(source, selector);
         public static IAsyncEnumerable<TResult> SelectMany<TSource, TCollection, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<IAsyncEnumerable<TCollection>>> collectionSelector, Func<TSource, TCollection, ValueTask<TResult>> resultSelector) => SelectManyAwaitCore<TSource, TCollection, TResult>(source, collectionSelector, resultSelector);
         public static IAsyncEnumerable<TResult> SelectMany<TSource, TCollection, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, int, ValueTask<IAsyncEnumerable<TCollection>>> collectionSelector, Func<TSource, TCollection, ValueTask<TResult>> resultSelector) => SelectManyAwaitCore<TSource, TCollection, TResult>(source, collectionSelector, resultSelector);
-        public static ValueTask<TSource> SingleAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => SingleAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<TSource> SingleOrDefaultAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => SingleOrDefaultAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<TSource> SingleAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => SingleAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<TSource> SingleOrDefaultAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => SingleOrDefaultAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
         public static IAsyncEnumerable<TSource> SkipWhile<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate) => SkipWhileAwaitCore<TSource>(source, predicate);
         public static IAsyncEnumerable<TSource> SkipWhile<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, int, ValueTask<bool>> predicate) => SkipWhileAwaitCore<TSource>(source, predicate);
-        public static ValueTask<double> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double>> selector, CancellationToken cancellationToken) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal>> selector, CancellationToken cancellationToken) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<int?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int?>> selector, CancellationToken cancellationToken) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<long?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long?>> selector, CancellationToken cancellationToken) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float?>> selector, CancellationToken cancellationToken) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double?>> selector, CancellationToken cancellationToken) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal?>> selector, CancellationToken cancellationToken) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<int> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int>> selector, CancellationToken cancellationToken) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<long> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long>> selector, CancellationToken cancellationToken) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float>> selector, CancellationToken cancellationToken) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<long?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long?>> selector, CancellationToken cancellationToken = default) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float?>> selector, CancellationToken cancellationToken = default) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double?>> selector, CancellationToken cancellationToken = default) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal?>> selector, CancellationToken cancellationToken = default) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<int> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int>> selector, CancellationToken cancellationToken = default) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<long> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long>> selector, CancellationToken cancellationToken = default) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float>> selector, CancellationToken cancellationToken = default) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double>> selector, CancellationToken cancellationToken = default) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal>> selector, CancellationToken cancellationToken = default) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<int?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int?>> selector, CancellationToken cancellationToken = default) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
         public static IAsyncEnumerable<TSource> TakeWhile<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate) => TakeWhileAwaitCore<TSource>(source, predicate);
         public static IAsyncEnumerable<TSource> TakeWhile<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, int, ValueTask<bool>> predicate) => TakeWhileAwaitCore<TSource>(source, predicate);
         public static IOrderedAsyncEnumerable<TSource> ThenBy<TSource, TKey>(this IOrderedAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector) => ThenByAwaitCore<TSource, TKey>(source, keySelector);
         public static IOrderedAsyncEnumerable<TSource> ThenBy<TSource, TKey>(this IOrderedAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, IComparer<TKey> comparer) => ThenByAwaitCore<TSource, TKey>(source, keySelector, comparer);
         public static IOrderedAsyncEnumerable<TSource> ThenByDescending<TSource, TKey>(this IOrderedAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector) => ThenByDescendingAwaitCore<TSource, TKey>(source, keySelector);
         public static IOrderedAsyncEnumerable<TSource> ThenByDescending<TSource, TKey>(this IOrderedAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, IComparer<TKey> comparer) => ThenByDescendingAwaitCore<TSource, TKey>(source, keySelector, comparer);
-        public static ValueTask<Dictionary<TKey, TSource>> ToDictionaryAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, CancellationToken cancellationToken) => ToDictionaryAwaitAsyncCore<TSource, TKey>(source, keySelector, cancellationToken);
-        public static ValueTask<Dictionary<TKey, TSource>> ToDictionaryAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken) => ToDictionaryAwaitAsyncCore<TSource, TKey>(source, keySelector, comparer, cancellationToken);
-        public static ValueTask<Dictionary<TKey, TElement>> ToDictionaryAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, CancellationToken cancellationToken) => ToDictionaryAwaitAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, cancellationToken);
-        public static ValueTask<Dictionary<TKey, TElement>> ToDictionaryAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken) => ToDictionaryAwaitAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, comparer, cancellationToken);
-        public static ValueTask<ILookup<TKey, TSource>> ToLookupAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, CancellationToken cancellationToken) => ToLookupAwaitAsyncCore<TSource, TKey>(source, keySelector, cancellationToken);
-        public static ValueTask<ILookup<TKey, TSource>> ToLookupAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken) => ToLookupAwaitAsyncCore<TSource, TKey>(source, keySelector, comparer, cancellationToken);
-        public static ValueTask<ILookup<TKey, TElement>> ToLookupAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, CancellationToken cancellationToken) => ToLookupAwaitAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, cancellationToken);
-        public static ValueTask<ILookup<TKey, TElement>> ToLookupAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken) => ToLookupAwaitAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, comparer, cancellationToken);
+        public static ValueTask<Dictionary<TKey, TSource>> ToDictionaryAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, CancellationToken cancellationToken = default) => ToDictionaryAwaitAsyncCore<TSource, TKey>(source, keySelector, cancellationToken);
+        public static ValueTask<Dictionary<TKey, TSource>> ToDictionaryAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken = default) => ToDictionaryAwaitAsyncCore<TSource, TKey>(source, keySelector, comparer, cancellationToken);
+        public static ValueTask<Dictionary<TKey, TElement>> ToDictionaryAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, CancellationToken cancellationToken = default) => ToDictionaryAwaitAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, cancellationToken);
+        public static ValueTask<Dictionary<TKey, TElement>> ToDictionaryAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken = default) => ToDictionaryAwaitAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, comparer, cancellationToken);
+        public static ValueTask<ILookup<TKey, TSource>> ToLookupAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, CancellationToken cancellationToken = default) => ToLookupAwaitAsyncCore<TSource, TKey>(source, keySelector, cancellationToken);
+        public static ValueTask<ILookup<TKey, TElement>> ToLookupAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, CancellationToken cancellationToken = default) => ToLookupAwaitAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, cancellationToken);
+        public static ValueTask<ILookup<TKey, TSource>> ToLookupAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken = default) => ToLookupAwaitAsyncCore<TSource, TKey>(source, keySelector, comparer, cancellationToken);
+        public static ValueTask<ILookup<TKey, TElement>> ToLookupAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken = default) => ToLookupAwaitAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, comparer, cancellationToken);
         public static IAsyncEnumerable<TSource> Where<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate) => WhereAwaitCore<TSource>(source, predicate);
         public static IAsyncEnumerable<TSource> Where<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, int, ValueTask<bool>> predicate) => WhereAwaitCore<TSource>(source, predicate);
         public static IAsyncEnumerable<TResult> Zip<TFirst, TSecond, TResult>(this IAsyncEnumerable<TFirst> first, IAsyncEnumerable<TSecond> second, Func<TFirst, TSecond, ValueTask<TResult>> selector) => ZipAwaitCore<TFirst, TSecond, TResult>(first, second, selector);
 
 #if !NO_DEEP_CANCELLATION
-        public static ValueTask<TSource> AggregateAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, TSource, CancellationToken, ValueTask<TSource>> accumulator, CancellationToken cancellationToken) => AggregateAwaitWithCancellationAsyncCore<TSource>(source, accumulator, cancellationToken);
-        public static ValueTask<TAccumulate> AggregateAsync<TSource, TAccumulate>(this IAsyncEnumerable<TSource> source, TAccumulate seed, Func<TAccumulate, TSource, CancellationToken, ValueTask<TAccumulate>> accumulator, CancellationToken cancellationToken) => AggregateAwaitWithCancellationAsyncCore<TSource, TAccumulate>(source, seed, accumulator, cancellationToken);
-        public static ValueTask<TResult> AggregateAsync<TSource, TAccumulate, TResult>(this IAsyncEnumerable<TSource> source, TAccumulate seed, Func<TAccumulate, TSource, CancellationToken, ValueTask<TAccumulate>> accumulator, Func<TAccumulate, CancellationToken, ValueTask<TResult>> resultSelector, CancellationToken cancellationToken) => AggregateAwaitWithCancellationAsyncCore<TSource, TAccumulate, TResult>(source, seed, accumulator, resultSelector, cancellationToken);
-        public static ValueTask<bool> AllAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => AllAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<bool> AnyAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => AnyAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<double?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double?>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal?>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int?>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long?>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float?>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<int> CountAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => CountAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<TSource> FirstAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => FirstAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<TSource> FirstOrDefaultAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => FirstOrDefaultAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<TSource> AggregateAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, TSource, CancellationToken, ValueTask<TSource>> accumulator, CancellationToken cancellationToken = default) => AggregateAwaitWithCancellationAsyncCore<TSource>(source, accumulator, cancellationToken);
+        public static ValueTask<TAccumulate> AggregateAsync<TSource, TAccumulate>(this IAsyncEnumerable<TSource> source, TAccumulate seed, Func<TAccumulate, TSource, CancellationToken, ValueTask<TAccumulate>> accumulator, CancellationToken cancellationToken = default) => AggregateAwaitWithCancellationAsyncCore<TSource, TAccumulate>(source, seed, accumulator, cancellationToken);
+        public static ValueTask<TResult> AggregateAsync<TSource, TAccumulate, TResult>(this IAsyncEnumerable<TSource> source, TAccumulate seed, Func<TAccumulate, TSource, CancellationToken, ValueTask<TAccumulate>> accumulator, Func<TAccumulate, CancellationToken, ValueTask<TResult>> resultSelector, CancellationToken cancellationToken = default) => AggregateAwaitWithCancellationAsyncCore<TSource, TAccumulate, TResult>(source, seed, accumulator, resultSelector, cancellationToken);
+        public static ValueTask<bool> AllAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => AllAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<bool> AnyAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => AnyAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<double> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int>> selector, CancellationToken cancellationToken = default) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long>> selector, CancellationToken cancellationToken = default) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float>> selector, CancellationToken cancellationToken = default) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double>> selector, CancellationToken cancellationToken = default) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal>> selector, CancellationToken cancellationToken = default) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int?>> selector, CancellationToken cancellationToken = default) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long?>> selector, CancellationToken cancellationToken = default) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float?>> selector, CancellationToken cancellationToken = default) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double?>> selector, CancellationToken cancellationToken = default) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal?>> selector, CancellationToken cancellationToken = default) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<int> CountAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => CountAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<TSource> FirstAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => FirstAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<TSource> FirstOrDefaultAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => FirstOrDefaultAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
         public static Task ForEachAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, Task> action, CancellationToken cancellationToken) => ForEachAwaitWithCancellationAsyncCore<TSource>(source, action, cancellationToken);
         public static Task ForEachAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, int, CancellationToken, Task> action, CancellationToken cancellationToken) => ForEachAwaitWithCancellationAsyncCore<TSource>(source, action, cancellationToken);
         public static IAsyncEnumerable<IAsyncGrouping<TKey, TSource>> GroupBy<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector) => GroupByAwaitWithCancellationCore<TSource, TKey>(source, keySelector);
+        public static IAsyncEnumerable<IAsyncGrouping<TKey, TSource>> GroupBy<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer) => GroupByAwaitWithCancellationCore<TSource, TKey>(source, keySelector, comparer);
         public static IAsyncEnumerable<IAsyncGrouping<TKey, TElement>> GroupBy<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector) => GroupByAwaitWithCancellationCore<TSource, TKey, TElement>(source, keySelector, elementSelector);
         public static IAsyncEnumerable<TResult> GroupBy<TSource, TKey, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TKey, IAsyncEnumerable<TSource>, CancellationToken, ValueTask<TResult>> resultSelector) => GroupByAwaitWithCancellationCore<TSource, TKey, TResult>(source, keySelector, resultSelector);
-        public static IAsyncEnumerable<IAsyncGrouping<TKey, TSource>> GroupBy<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer) => GroupByAwaitWithCancellationCore<TSource, TKey>(source, keySelector, comparer);
+        public static IAsyncEnumerable<TResult> GroupBy<TSource, TKey, TElement, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, Func<TKey, IAsyncEnumerable<TElement>, CancellationToken, ValueTask<TResult>> resultSelector) => GroupByAwaitWithCancellationCore<TSource, TKey, TElement, TResult>(source, keySelector, elementSelector, resultSelector);
         public static IAsyncEnumerable<IAsyncGrouping<TKey, TElement>> GroupBy<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, IEqualityComparer<TKey> comparer) => GroupByAwaitWithCancellationCore<TSource, TKey, TElement>(source, keySelector, elementSelector, comparer);
         public static IAsyncEnumerable<TResult> GroupBy<TSource, TKey, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TKey, IAsyncEnumerable<TSource>, CancellationToken, ValueTask<TResult>> resultSelector, IEqualityComparer<TKey> comparer) => GroupByAwaitWithCancellationCore<TSource, TKey, TResult>(source, keySelector, resultSelector, comparer);
-        public static IAsyncEnumerable<TResult> GroupBy<TSource, TKey, TElement, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, Func<TKey, IAsyncEnumerable<TElement>, CancellationToken, ValueTask<TResult>> resultSelector) => GroupByAwaitWithCancellationCore<TSource, TKey, TElement, TResult>(source, keySelector, elementSelector, resultSelector);
         public static IAsyncEnumerable<TResult> GroupBy<TSource, TKey, TElement, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, Func<TKey, IAsyncEnumerable<TElement>, CancellationToken, ValueTask<TResult>> resultSelector, IEqualityComparer<TKey> comparer) => GroupByAwaitWithCancellationCore<TSource, TKey, TElement, TResult>(source, keySelector, elementSelector, resultSelector, comparer);
         public static IAsyncEnumerable<TResult> GroupJoin<TOuter, TInner, TKey, TResult>(this IAsyncEnumerable<TOuter> outer, IAsyncEnumerable<TInner> inner, Func<TOuter, CancellationToken, ValueTask<TKey>> outerKeySelector, Func<TInner, CancellationToken, ValueTask<TKey>> innerKeySelector, Func<TOuter, IAsyncEnumerable<TInner>, CancellationToken, ValueTask<TResult>> resultSelector) => GroupJoinAwaitWithCancellationCore<TOuter, TInner, TKey, TResult>(outer, inner, outerKeySelector, innerKeySelector, resultSelector);
         public static IAsyncEnumerable<TResult> GroupJoin<TOuter, TInner, TKey, TResult>(this IAsyncEnumerable<TOuter> outer, IAsyncEnumerable<TInner> inner, Func<TOuter, CancellationToken, ValueTask<TKey>> outerKeySelector, Func<TInner, CancellationToken, ValueTask<TKey>> innerKeySelector, Func<TOuter, IAsyncEnumerable<TInner>, CancellationToken, ValueTask<TResult>> resultSelector, IEqualityComparer<TKey> comparer) => GroupJoinAwaitWithCancellationCore<TOuter, TInner, TKey, TResult>(outer, inner, outerKeySelector, innerKeySelector, resultSelector, comparer);
         public static IAsyncEnumerable<TResult> Join<TOuter, TInner, TKey, TResult>(this IAsyncEnumerable<TOuter> outer, IAsyncEnumerable<TInner> inner, Func<TOuter, CancellationToken, ValueTask<TKey>> outerKeySelector, Func<TInner, CancellationToken, ValueTask<TKey>> innerKeySelector, Func<TOuter, TInner, CancellationToken, ValueTask<TResult>> resultSelector) => JoinAwaitWithCancellationCore<TOuter, TInner, TKey, TResult>(outer, inner, outerKeySelector, innerKeySelector, resultSelector);
         public static IAsyncEnumerable<TResult> Join<TOuter, TInner, TKey, TResult>(this IAsyncEnumerable<TOuter> outer, IAsyncEnumerable<TInner> inner, Func<TOuter, CancellationToken, ValueTask<TKey>> outerKeySelector, Func<TInner, CancellationToken, ValueTask<TKey>> innerKeySelector, Func<TOuter, TInner, CancellationToken, ValueTask<TResult>> resultSelector, IEqualityComparer<TKey> comparer) => JoinAwaitWithCancellationCore<TOuter, TInner, TKey, TResult>(outer, inner, outerKeySelector, innerKeySelector, resultSelector, comparer);
-        public static ValueTask<TSource> LastAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => LastAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<TSource> LastOrDefaultAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => LastOrDefaultAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<long> LongCountAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => LongCountAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<int> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<int?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int?>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<long> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<long?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long?>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float?>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double?>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal?>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<TResult> MaxAsync<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TResult>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsyncCore<TSource, TResult>(source, selector, cancellationToken);
-        public static ValueTask<long?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long?>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float?>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double?>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal?>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<TResult> MinAsync<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TResult>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsyncCore<TSource, TResult>(source, selector, cancellationToken);
-        public static ValueTask<int> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<int?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int?>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<long> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<TSource> LastAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => LastAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<TSource> LastOrDefaultAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => LastOrDefaultAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<long> LongCountAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => LongCountAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<long> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long>> selector, CancellationToken cancellationToken = default) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<long?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long?>> selector, CancellationToken cancellationToken = default) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float>> selector, CancellationToken cancellationToken = default) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float?>> selector, CancellationToken cancellationToken = default) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double>> selector, CancellationToken cancellationToken = default) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double?>> selector, CancellationToken cancellationToken = default) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal>> selector, CancellationToken cancellationToken = default) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal?>> selector, CancellationToken cancellationToken = default) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<TResult> MaxAsync<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TResult>> selector, CancellationToken cancellationToken = default) => MaxAwaitWithCancellationAsyncCore<TSource, TResult>(source, selector, cancellationToken);
+        public static ValueTask<int> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int>> selector, CancellationToken cancellationToken = default) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<int?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int?>> selector, CancellationToken cancellationToken = default) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double>> selector, CancellationToken cancellationToken = default) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double?>> selector, CancellationToken cancellationToken = default) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal>> selector, CancellationToken cancellationToken = default) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal?>> selector, CancellationToken cancellationToken = default) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<int> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int>> selector, CancellationToken cancellationToken = default) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<int?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int?>> selector, CancellationToken cancellationToken = default) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<long> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long>> selector, CancellationToken cancellationToken = default) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<long?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long?>> selector, CancellationToken cancellationToken = default) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float>> selector, CancellationToken cancellationToken = default) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float?>> selector, CancellationToken cancellationToken = default) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<TResult> MinAsync<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TResult>> selector, CancellationToken cancellationToken = default) => MinAwaitWithCancellationAsyncCore<TSource, TResult>(source, selector, cancellationToken);
         public static IOrderedAsyncEnumerable<TSource> OrderBy<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector) => OrderByAwaitWithCancellationCore<TSource, TKey>(source, keySelector);
         public static IOrderedAsyncEnumerable<TSource> OrderBy<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, IComparer<TKey> comparer) => OrderByAwaitWithCancellationCore<TSource, TKey>(source, keySelector, comparer);
         public static IOrderedAsyncEnumerable<TSource> OrderByDescending<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector) => OrderByDescendingAwaitWithCancellationCore<TSource, TKey>(source, keySelector);
@@ -178,96 +178,96 @@ namespace System.Linq
         public static IAsyncEnumerable<TResult> SelectMany<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, int, CancellationToken, ValueTask<IAsyncEnumerable<TResult>>> selector) => SelectManyAwaitWithCancellationCore<TSource, TResult>(source, selector);
         public static IAsyncEnumerable<TResult> SelectMany<TSource, TCollection, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<IAsyncEnumerable<TCollection>>> collectionSelector, Func<TSource, TCollection, CancellationToken, ValueTask<TResult>> resultSelector) => SelectManyAwaitWithCancellationCore<TSource, TCollection, TResult>(source, collectionSelector, resultSelector);
         public static IAsyncEnumerable<TResult> SelectMany<TSource, TCollection, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, int, CancellationToken, ValueTask<IAsyncEnumerable<TCollection>>> collectionSelector, Func<TSource, TCollection, CancellationToken, ValueTask<TResult>> resultSelector) => SelectManyAwaitWithCancellationCore<TSource, TCollection, TResult>(source, collectionSelector, resultSelector);
-        public static ValueTask<TSource> SingleAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => SingleAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<TSource> SingleOrDefaultAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => SingleOrDefaultAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<TSource> SingleAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => SingleAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<TSource> SingleOrDefaultAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => SingleOrDefaultAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
         public static IAsyncEnumerable<TSource> SkipWhile<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate) => SkipWhileAwaitWithCancellationCore<TSource>(source, predicate);
         public static IAsyncEnumerable<TSource> SkipWhile<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, int, CancellationToken, ValueTask<bool>> predicate) => SkipWhileAwaitWithCancellationCore<TSource>(source, predicate);
-        public static ValueTask<double> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<int?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int?>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<long?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long?>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float?>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double?>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal?>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<int> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<long> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<int?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int?>> selector, CancellationToken cancellationToken = default) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<long?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long?>> selector, CancellationToken cancellationToken = default) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float?>> selector, CancellationToken cancellationToken = default) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double?>> selector, CancellationToken cancellationToken = default) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal?>> selector, CancellationToken cancellationToken = default) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<int> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int>> selector, CancellationToken cancellationToken = default) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<long> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long>> selector, CancellationToken cancellationToken = default) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float>> selector, CancellationToken cancellationToken = default) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double>> selector, CancellationToken cancellationToken = default) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal>> selector, CancellationToken cancellationToken = default) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
         public static IAsyncEnumerable<TSource> TakeWhile<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate) => TakeWhileAwaitWithCancellationCore<TSource>(source, predicate);
         public static IAsyncEnumerable<TSource> TakeWhile<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, int, CancellationToken, ValueTask<bool>> predicate) => TakeWhileAwaitWithCancellationCore<TSource>(source, predicate);
         public static IOrderedAsyncEnumerable<TSource> ThenBy<TSource, TKey>(this IOrderedAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector) => ThenByAwaitWithCancellationCore<TSource, TKey>(source, keySelector);
         public static IOrderedAsyncEnumerable<TSource> ThenBy<TSource, TKey>(this IOrderedAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, IComparer<TKey> comparer) => ThenByAwaitWithCancellationCore<TSource, TKey>(source, keySelector, comparer);
         public static IOrderedAsyncEnumerable<TSource> ThenByDescending<TSource, TKey>(this IOrderedAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector) => ThenByDescendingAwaitWithCancellationCore<TSource, TKey>(source, keySelector);
         public static IOrderedAsyncEnumerable<TSource> ThenByDescending<TSource, TKey>(this IOrderedAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, IComparer<TKey> comparer) => ThenByDescendingAwaitWithCancellationCore<TSource, TKey>(source, keySelector, comparer);
-        public static ValueTask<Dictionary<TKey, TSource>> ToDictionaryAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, CancellationToken cancellationToken) => ToDictionaryAwaitWithCancellationAsyncCore<TSource, TKey>(source, keySelector, cancellationToken);
-        public static ValueTask<Dictionary<TKey, TSource>> ToDictionaryAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken) => ToDictionaryAwaitWithCancellationAsyncCore<TSource, TKey>(source, keySelector, comparer, cancellationToken);
-        public static ValueTask<Dictionary<TKey, TElement>> ToDictionaryAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, CancellationToken cancellationToken) => ToDictionaryAwaitWithCancellationAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, cancellationToken);
-        public static ValueTask<Dictionary<TKey, TElement>> ToDictionaryAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken) => ToDictionaryAwaitWithCancellationAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, comparer, cancellationToken);
-        public static ValueTask<ILookup<TKey, TSource>> ToLookupAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, CancellationToken cancellationToken) => ToLookupAwaitWithCancellationAsyncCore<TSource, TKey>(source, keySelector, cancellationToken);
-        public static ValueTask<ILookup<TKey, TSource>> ToLookupAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken) => ToLookupAwaitWithCancellationAsyncCore<TSource, TKey>(source, keySelector, comparer, cancellationToken);
-        public static ValueTask<ILookup<TKey, TElement>> ToLookupAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, CancellationToken cancellationToken) => ToLookupAwaitWithCancellationAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, cancellationToken);
-        public static ValueTask<ILookup<TKey, TElement>> ToLookupAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken) => ToLookupAwaitWithCancellationAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, comparer, cancellationToken);
+        public static ValueTask<Dictionary<TKey, TSource>> ToDictionaryAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, CancellationToken cancellationToken = default) => ToDictionaryAwaitWithCancellationAsyncCore<TSource, TKey>(source, keySelector, cancellationToken);
+        public static ValueTask<Dictionary<TKey, TSource>> ToDictionaryAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken = default) => ToDictionaryAwaitWithCancellationAsyncCore<TSource, TKey>(source, keySelector, comparer, cancellationToken);
+        public static ValueTask<Dictionary<TKey, TElement>> ToDictionaryAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, CancellationToken cancellationToken = default) => ToDictionaryAwaitWithCancellationAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, cancellationToken);
+        public static ValueTask<Dictionary<TKey, TElement>> ToDictionaryAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken = default) => ToDictionaryAwaitWithCancellationAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, comparer, cancellationToken);
+        public static ValueTask<ILookup<TKey, TSource>> ToLookupAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, CancellationToken cancellationToken = default) => ToLookupAwaitWithCancellationAsyncCore<TSource, TKey>(source, keySelector, cancellationToken);
+        public static ValueTask<ILookup<TKey, TElement>> ToLookupAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, CancellationToken cancellationToken = default) => ToLookupAwaitWithCancellationAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, cancellationToken);
+        public static ValueTask<ILookup<TKey, TSource>> ToLookupAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken = default) => ToLookupAwaitWithCancellationAsyncCore<TSource, TKey>(source, keySelector, comparer, cancellationToken);
+        public static ValueTask<ILookup<TKey, TElement>> ToLookupAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken = default) => ToLookupAwaitWithCancellationAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, comparer, cancellationToken);
         public static IAsyncEnumerable<TSource> Where<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate) => WhereAwaitWithCancellationCore<TSource>(source, predicate);
         public static IAsyncEnumerable<TSource> Where<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, int, CancellationToken, ValueTask<bool>> predicate) => WhereAwaitWithCancellationCore<TSource>(source, predicate);
         public static IAsyncEnumerable<TResult> Zip<TFirst, TSecond, TResult>(this IAsyncEnumerable<TFirst> first, IAsyncEnumerable<TSecond> second, Func<TFirst, TSecond, CancellationToken, ValueTask<TResult>> selector) => ZipAwaitWithCancellationCore<TFirst, TSecond, TResult>(first, second, selector);
 #endif
 #else
-        public static ValueTask<TSource> AggregateAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, TSource, ValueTask<TSource>> accumulator, CancellationToken cancellationToken) => AggregateAwaitAsyncCore<TSource>(source, accumulator, cancellationToken);
-        public static ValueTask<TAccumulate> AggregateAwaitAsync<TSource, TAccumulate>(this IAsyncEnumerable<TSource> source, TAccumulate seed, Func<TAccumulate, TSource, ValueTask<TAccumulate>> accumulator, CancellationToken cancellationToken) => AggregateAwaitAsyncCore<TSource, TAccumulate>(source, seed, accumulator, cancellationToken);
-        public static ValueTask<TResult> AggregateAwaitAsync<TSource, TAccumulate, TResult>(this IAsyncEnumerable<TSource> source, TAccumulate seed, Func<TAccumulate, TSource, ValueTask<TAccumulate>> accumulator, Func<TAccumulate, ValueTask<TResult>> resultSelector, CancellationToken cancellationToken) => AggregateAwaitAsyncCore<TSource, TAccumulate, TResult>(source, seed, accumulator, resultSelector, cancellationToken);
-        public static ValueTask<bool> AllAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => AllAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<bool> AnyAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => AnyAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<double?> AverageAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double?>> selector, CancellationToken cancellationToken) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal?> AverageAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal?>> selector, CancellationToken cancellationToken) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double> AverageAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int>> selector, CancellationToken cancellationToken) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double> AverageAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long>> selector, CancellationToken cancellationToken) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float> AverageAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float>> selector, CancellationToken cancellationToken) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double> AverageAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double>> selector, CancellationToken cancellationToken) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal> AverageAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal>> selector, CancellationToken cancellationToken) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double?> AverageAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int?>> selector, CancellationToken cancellationToken) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double?> AverageAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long?>> selector, CancellationToken cancellationToken) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float?> AverageAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float?>> selector, CancellationToken cancellationToken) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<int> CountAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => CountAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<TSource> FirstAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => FirstAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<TSource> FirstOrDefaultAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => FirstOrDefaultAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static Task ForEachAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, Task> action, CancellationToken cancellationToken) => ForEachAwaitAsyncCore<TSource>(source, action, cancellationToken);
-        public static Task ForEachAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, int, Task> action, CancellationToken cancellationToken) => ForEachAwaitAsyncCore<TSource>(source, action, cancellationToken);
+        public static ValueTask<TSource> AggregateAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, TSource, ValueTask<TSource>> accumulator, CancellationToken cancellationToken = default) => AggregateAwaitAsyncCore<TSource>(source, accumulator, cancellationToken);
+        public static ValueTask<TAccumulate> AggregateAwaitAsync<TSource, TAccumulate>(this IAsyncEnumerable<TSource> source, TAccumulate seed, Func<TAccumulate, TSource, ValueTask<TAccumulate>> accumulator, CancellationToken cancellationToken = default) => AggregateAwaitAsyncCore<TSource, TAccumulate>(source, seed, accumulator, cancellationToken);
+        public static ValueTask<TResult> AggregateAwaitAsync<TSource, TAccumulate, TResult>(this IAsyncEnumerable<TSource> source, TAccumulate seed, Func<TAccumulate, TSource, ValueTask<TAccumulate>> accumulator, Func<TAccumulate, ValueTask<TResult>> resultSelector, CancellationToken cancellationToken = default) => AggregateAwaitAsyncCore<TSource, TAccumulate, TResult>(source, seed, accumulator, resultSelector, cancellationToken);
+        public static ValueTask<bool> AllAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => AllAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<bool> AnyAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => AnyAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<double> AverageAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int>> selector, CancellationToken cancellationToken = default) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double> AverageAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long>> selector, CancellationToken cancellationToken = default) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float> AverageAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float>> selector, CancellationToken cancellationToken = default) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double> AverageAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double>> selector, CancellationToken cancellationToken = default) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal> AverageAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal>> selector, CancellationToken cancellationToken = default) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double?> AverageAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int?>> selector, CancellationToken cancellationToken = default) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double?> AverageAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long?>> selector, CancellationToken cancellationToken = default) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float?> AverageAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float?>> selector, CancellationToken cancellationToken = default) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double?> AverageAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double?>> selector, CancellationToken cancellationToken = default) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal?> AverageAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal?>> selector, CancellationToken cancellationToken = default) => AverageAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<int> CountAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => CountAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<TSource> FirstAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => FirstAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<TSource> FirstOrDefaultAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => FirstOrDefaultAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static Task ForEachAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, Task> action, CancellationToken cancellationToken = default) => ForEachAwaitAsyncCore<TSource>(source, action, cancellationToken);
+        public static Task ForEachAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, int, Task> action, CancellationToken cancellationToken = default) => ForEachAwaitAsyncCore<TSource>(source, action, cancellationToken);
         public static IAsyncEnumerable<IAsyncGrouping<TKey, TSource>> GroupByAwait<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector) => GroupByAwaitCore<TSource, TKey>(source, keySelector);
-        public static IAsyncEnumerable<TResult> GroupByAwait<TSource, TKey, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TKey, IAsyncEnumerable<TSource>, ValueTask<TResult>> resultSelector) => GroupByAwaitCore<TSource, TKey, TResult>(source, keySelector, resultSelector);
         public static IAsyncEnumerable<IAsyncGrouping<TKey, TSource>> GroupByAwait<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer) => GroupByAwaitCore<TSource, TKey>(source, keySelector, comparer);
         public static IAsyncEnumerable<IAsyncGrouping<TKey, TElement>> GroupByAwait<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector) => GroupByAwaitCore<TSource, TKey, TElement>(source, keySelector, elementSelector);
-        public static IAsyncEnumerable<TResult> GroupByAwait<TSource, TKey, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TKey, IAsyncEnumerable<TSource>, ValueTask<TResult>> resultSelector, IEqualityComparer<TKey> comparer) => GroupByAwaitCore<TSource, TKey, TResult>(source, keySelector, resultSelector, comparer);
+        public static IAsyncEnumerable<TResult> GroupByAwait<TSource, TKey, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TKey, IAsyncEnumerable<TSource>, ValueTask<TResult>> resultSelector) => GroupByAwaitCore<TSource, TKey, TResult>(source, keySelector, resultSelector);
         public static IAsyncEnumerable<TResult> GroupByAwait<TSource, TKey, TElement, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, Func<TKey, IAsyncEnumerable<TElement>, ValueTask<TResult>> resultSelector) => GroupByAwaitCore<TSource, TKey, TElement, TResult>(source, keySelector, elementSelector, resultSelector);
         public static IAsyncEnumerable<IAsyncGrouping<TKey, TElement>> GroupByAwait<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, IEqualityComparer<TKey> comparer) => GroupByAwaitCore<TSource, TKey, TElement>(source, keySelector, elementSelector, comparer);
+        public static IAsyncEnumerable<TResult> GroupByAwait<TSource, TKey, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TKey, IAsyncEnumerable<TSource>, ValueTask<TResult>> resultSelector, IEqualityComparer<TKey> comparer) => GroupByAwaitCore<TSource, TKey, TResult>(source, keySelector, resultSelector, comparer);
         public static IAsyncEnumerable<TResult> GroupByAwait<TSource, TKey, TElement, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, Func<TKey, IAsyncEnumerable<TElement>, ValueTask<TResult>> resultSelector, IEqualityComparer<TKey> comparer) => GroupByAwaitCore<TSource, TKey, TElement, TResult>(source, keySelector, elementSelector, resultSelector, comparer);
         public static IAsyncEnumerable<TResult> GroupJoinAwait<TOuter, TInner, TKey, TResult>(this IAsyncEnumerable<TOuter> outer, IAsyncEnumerable<TInner> inner, Func<TOuter, ValueTask<TKey>> outerKeySelector, Func<TInner, ValueTask<TKey>> innerKeySelector, Func<TOuter, IAsyncEnumerable<TInner>, ValueTask<TResult>> resultSelector) => GroupJoinAwaitCore<TOuter, TInner, TKey, TResult>(outer, inner, outerKeySelector, innerKeySelector, resultSelector);
         public static IAsyncEnumerable<TResult> GroupJoinAwait<TOuter, TInner, TKey, TResult>(this IAsyncEnumerable<TOuter> outer, IAsyncEnumerable<TInner> inner, Func<TOuter, ValueTask<TKey>> outerKeySelector, Func<TInner, ValueTask<TKey>> innerKeySelector, Func<TOuter, IAsyncEnumerable<TInner>, ValueTask<TResult>> resultSelector, IEqualityComparer<TKey> comparer) => GroupJoinAwaitCore<TOuter, TInner, TKey, TResult>(outer, inner, outerKeySelector, innerKeySelector, resultSelector, comparer);
         public static IAsyncEnumerable<TResult> JoinAwait<TOuter, TInner, TKey, TResult>(this IAsyncEnumerable<TOuter> outer, IAsyncEnumerable<TInner> inner, Func<TOuter, ValueTask<TKey>> outerKeySelector, Func<TInner, ValueTask<TKey>> innerKeySelector, Func<TOuter, TInner, ValueTask<TResult>> resultSelector) => JoinAwaitCore<TOuter, TInner, TKey, TResult>(outer, inner, outerKeySelector, innerKeySelector, resultSelector);
         public static IAsyncEnumerable<TResult> JoinAwait<TOuter, TInner, TKey, TResult>(this IAsyncEnumerable<TOuter> outer, IAsyncEnumerable<TInner> inner, Func<TOuter, ValueTask<TKey>> outerKeySelector, Func<TInner, ValueTask<TKey>> innerKeySelector, Func<TOuter, TInner, ValueTask<TResult>> resultSelector, IEqualityComparer<TKey> comparer) => JoinAwaitCore<TOuter, TInner, TKey, TResult>(outer, inner, outerKeySelector, innerKeySelector, resultSelector, comparer);
-        public static ValueTask<TSource> LastAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => LastAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<TSource> LastOrDefaultAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => LastOrDefaultAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<long> LongCountAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => LongCountAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<int> MaxAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int>> selector, CancellationToken cancellationToken) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<int?> MaxAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int?>> selector, CancellationToken cancellationToken) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<long> MaxAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long>> selector, CancellationToken cancellationToken) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<long?> MaxAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long?>> selector, CancellationToken cancellationToken) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float> MaxAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float>> selector, CancellationToken cancellationToken) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float?> MaxAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float?>> selector, CancellationToken cancellationToken) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double> MaxAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double>> selector, CancellationToken cancellationToken) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double?> MaxAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double?>> selector, CancellationToken cancellationToken) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal> MaxAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal>> selector, CancellationToken cancellationToken) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal?> MaxAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal?>> selector, CancellationToken cancellationToken) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<TResult> MaxAwaitAsync<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TResult>> selector, CancellationToken cancellationToken) => MaxAwaitAsyncCore<TSource, TResult>(source, selector, cancellationToken);
-        public static ValueTask<float> MinAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float>> selector, CancellationToken cancellationToken) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float?> MinAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float?>> selector, CancellationToken cancellationToken) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double> MinAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double>> selector, CancellationToken cancellationToken) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double?> MinAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double?>> selector, CancellationToken cancellationToken) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal> MinAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal>> selector, CancellationToken cancellationToken) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal?> MinAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal?>> selector, CancellationToken cancellationToken) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<int> MinAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int>> selector, CancellationToken cancellationToken) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<int?> MinAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int?>> selector, CancellationToken cancellationToken) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<long> MinAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long>> selector, CancellationToken cancellationToken) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<long?> MinAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long?>> selector, CancellationToken cancellationToken) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<TResult> MinAwaitAsync<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TResult>> selector, CancellationToken cancellationToken) => MinAwaitAsyncCore<TSource, TResult>(source, selector, cancellationToken);
+        public static ValueTask<TSource> LastAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => LastAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<TSource> LastOrDefaultAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => LastOrDefaultAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<long> LongCountAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => LongCountAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<long> MaxAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long>> selector, CancellationToken cancellationToken = default) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<long?> MaxAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long?>> selector, CancellationToken cancellationToken = default) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float> MaxAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float>> selector, CancellationToken cancellationToken = default) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float?> MaxAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float?>> selector, CancellationToken cancellationToken = default) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double> MaxAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double>> selector, CancellationToken cancellationToken = default) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double?> MaxAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double?>> selector, CancellationToken cancellationToken = default) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal> MaxAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal>> selector, CancellationToken cancellationToken = default) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal?> MaxAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal?>> selector, CancellationToken cancellationToken = default) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<TResult> MaxAwaitAsync<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TResult>> selector, CancellationToken cancellationToken = default) => MaxAwaitAsyncCore<TSource, TResult>(source, selector, cancellationToken);
+        public static ValueTask<int> MaxAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int>> selector, CancellationToken cancellationToken = default) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<int?> MaxAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int?>> selector, CancellationToken cancellationToken = default) => MaxAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double> MinAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double>> selector, CancellationToken cancellationToken = default) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double?> MinAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double?>> selector, CancellationToken cancellationToken = default) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal> MinAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal>> selector, CancellationToken cancellationToken = default) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal?> MinAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal?>> selector, CancellationToken cancellationToken = default) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<int> MinAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int>> selector, CancellationToken cancellationToken = default) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<int?> MinAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int?>> selector, CancellationToken cancellationToken = default) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<long> MinAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long>> selector, CancellationToken cancellationToken = default) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<long?> MinAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long?>> selector, CancellationToken cancellationToken = default) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float> MinAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float>> selector, CancellationToken cancellationToken = default) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float?> MinAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float?>> selector, CancellationToken cancellationToken = default) => MinAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<TResult> MinAwaitAsync<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TResult>> selector, CancellationToken cancellationToken = default) => MinAwaitAsyncCore<TSource, TResult>(source, selector, cancellationToken);
         public static IOrderedAsyncEnumerable<TSource> OrderByAwait<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector) => OrderByAwaitCore<TSource, TKey>(source, keySelector);
         public static IOrderedAsyncEnumerable<TSource> OrderByAwait<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, IComparer<TKey> comparer) => OrderByAwaitCore<TSource, TKey>(source, keySelector, comparer);
         public static IOrderedAsyncEnumerable<TSource> OrderByDescendingAwait<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector) => OrderByDescendingAwaitCore<TSource, TKey>(source, keySelector);
@@ -278,96 +278,96 @@ namespace System.Linq
         public static IAsyncEnumerable<TResult> SelectManyAwait<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, int, ValueTask<IAsyncEnumerable<TResult>>> selector) => SelectManyAwaitCore<TSource, TResult>(source, selector);
         public static IAsyncEnumerable<TResult> SelectManyAwait<TSource, TCollection, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<IAsyncEnumerable<TCollection>>> collectionSelector, Func<TSource, TCollection, ValueTask<TResult>> resultSelector) => SelectManyAwaitCore<TSource, TCollection, TResult>(source, collectionSelector, resultSelector);
         public static IAsyncEnumerable<TResult> SelectManyAwait<TSource, TCollection, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, int, ValueTask<IAsyncEnumerable<TCollection>>> collectionSelector, Func<TSource, TCollection, ValueTask<TResult>> resultSelector) => SelectManyAwaitCore<TSource, TCollection, TResult>(source, collectionSelector, resultSelector);
-        public static ValueTask<TSource> SingleAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => SingleAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<TSource> SingleOrDefaultAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => SingleOrDefaultAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<TSource> SingleAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => SingleAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<TSource> SingleOrDefaultAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => SingleOrDefaultAwaitAsyncCore<TSource>(source, predicate, cancellationToken);
         public static IAsyncEnumerable<TSource> SkipWhileAwait<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate) => SkipWhileAwaitCore<TSource>(source, predicate);
         public static IAsyncEnumerable<TSource> SkipWhileAwait<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, int, ValueTask<bool>> predicate) => SkipWhileAwaitCore<TSource>(source, predicate);
-        public static ValueTask<double> SumAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double>> selector, CancellationToken cancellationToken) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal> SumAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal>> selector, CancellationToken cancellationToken) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<int?> SumAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int?>> selector, CancellationToken cancellationToken) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<long?> SumAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long?>> selector, CancellationToken cancellationToken) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float?> SumAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float?>> selector, CancellationToken cancellationToken) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double?> SumAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double?>> selector, CancellationToken cancellationToken) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal?> SumAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal?>> selector, CancellationToken cancellationToken) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<int> SumAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int>> selector, CancellationToken cancellationToken) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<long> SumAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long>> selector, CancellationToken cancellationToken) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float> SumAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float>> selector, CancellationToken cancellationToken) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<long?> SumAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long?>> selector, CancellationToken cancellationToken = default) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float?> SumAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float?>> selector, CancellationToken cancellationToken = default) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double?> SumAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double?>> selector, CancellationToken cancellationToken = default) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal?> SumAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal?>> selector, CancellationToken cancellationToken = default) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<int> SumAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int>> selector, CancellationToken cancellationToken = default) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<long> SumAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long>> selector, CancellationToken cancellationToken = default) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float> SumAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float>> selector, CancellationToken cancellationToken = default) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double> SumAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double>> selector, CancellationToken cancellationToken = default) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal> SumAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal>> selector, CancellationToken cancellationToken = default) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<int?> SumAwaitAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int?>> selector, CancellationToken cancellationToken = default) => SumAwaitAsyncCore<TSource>(source, selector, cancellationToken);
         public static IAsyncEnumerable<TSource> TakeWhileAwait<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate) => TakeWhileAwaitCore<TSource>(source, predicate);
         public static IAsyncEnumerable<TSource> TakeWhileAwait<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, int, ValueTask<bool>> predicate) => TakeWhileAwaitCore<TSource>(source, predicate);
         public static IOrderedAsyncEnumerable<TSource> ThenByAwait<TSource, TKey>(this IOrderedAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector) => ThenByAwaitCore<TSource, TKey>(source, keySelector);
         public static IOrderedAsyncEnumerable<TSource> ThenByAwait<TSource, TKey>(this IOrderedAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, IComparer<TKey> comparer) => ThenByAwaitCore<TSource, TKey>(source, keySelector, comparer);
         public static IOrderedAsyncEnumerable<TSource> ThenByDescendingAwait<TSource, TKey>(this IOrderedAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector) => ThenByDescendingAwaitCore<TSource, TKey>(source, keySelector);
         public static IOrderedAsyncEnumerable<TSource> ThenByDescendingAwait<TSource, TKey>(this IOrderedAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, IComparer<TKey> comparer) => ThenByDescendingAwaitCore<TSource, TKey>(source, keySelector, comparer);
-        public static ValueTask<Dictionary<TKey, TSource>> ToDictionaryAwaitAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, CancellationToken cancellationToken) => ToDictionaryAwaitAsyncCore<TSource, TKey>(source, keySelector, cancellationToken);
-        public static ValueTask<Dictionary<TKey, TSource>> ToDictionaryAwaitAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken) => ToDictionaryAwaitAsyncCore<TSource, TKey>(source, keySelector, comparer, cancellationToken);
-        public static ValueTask<Dictionary<TKey, TElement>> ToDictionaryAwaitAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, CancellationToken cancellationToken) => ToDictionaryAwaitAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, cancellationToken);
-        public static ValueTask<Dictionary<TKey, TElement>> ToDictionaryAwaitAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken) => ToDictionaryAwaitAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, comparer, cancellationToken);
-        public static ValueTask<ILookup<TKey, TSource>> ToLookupAwaitAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, CancellationToken cancellationToken) => ToLookupAwaitAsyncCore<TSource, TKey>(source, keySelector, cancellationToken);
-        public static ValueTask<ILookup<TKey, TSource>> ToLookupAwaitAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken) => ToLookupAwaitAsyncCore<TSource, TKey>(source, keySelector, comparer, cancellationToken);
-        public static ValueTask<ILookup<TKey, TElement>> ToLookupAwaitAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, CancellationToken cancellationToken) => ToLookupAwaitAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, cancellationToken);
-        public static ValueTask<ILookup<TKey, TElement>> ToLookupAwaitAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken) => ToLookupAwaitAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, comparer, cancellationToken);
+        public static ValueTask<Dictionary<TKey, TSource>> ToDictionaryAwaitAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, CancellationToken cancellationToken = default) => ToDictionaryAwaitAsyncCore<TSource, TKey>(source, keySelector, cancellationToken);
+        public static ValueTask<Dictionary<TKey, TSource>> ToDictionaryAwaitAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken = default) => ToDictionaryAwaitAsyncCore<TSource, TKey>(source, keySelector, comparer, cancellationToken);
+        public static ValueTask<Dictionary<TKey, TElement>> ToDictionaryAwaitAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, CancellationToken cancellationToken = default) => ToDictionaryAwaitAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, cancellationToken);
+        public static ValueTask<Dictionary<TKey, TElement>> ToDictionaryAwaitAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken = default) => ToDictionaryAwaitAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, comparer, cancellationToken);
+        public static ValueTask<ILookup<TKey, TSource>> ToLookupAwaitAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, CancellationToken cancellationToken = default) => ToLookupAwaitAsyncCore<TSource, TKey>(source, keySelector, cancellationToken);
+        public static ValueTask<ILookup<TKey, TElement>> ToLookupAwaitAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, CancellationToken cancellationToken = default) => ToLookupAwaitAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, cancellationToken);
+        public static ValueTask<ILookup<TKey, TSource>> ToLookupAwaitAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken = default) => ToLookupAwaitAsyncCore<TSource, TKey>(source, keySelector, comparer, cancellationToken);
+        public static ValueTask<ILookup<TKey, TElement>> ToLookupAwaitAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken = default) => ToLookupAwaitAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, comparer, cancellationToken);
         public static IAsyncEnumerable<TSource> WhereAwait<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate) => WhereAwaitCore<TSource>(source, predicate);
         public static IAsyncEnumerable<TSource> WhereAwait<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, int, ValueTask<bool>> predicate) => WhereAwaitCore<TSource>(source, predicate);
         public static IAsyncEnumerable<TResult> ZipAwait<TFirst, TSecond, TResult>(this IAsyncEnumerable<TFirst> first, IAsyncEnumerable<TSecond> second, Func<TFirst, TSecond, ValueTask<TResult>> selector) => ZipAwaitCore<TFirst, TSecond, TResult>(first, second, selector);
 
 #if !NO_DEEP_CANCELLATION
-        public static ValueTask<TSource> AggregateAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, TSource, CancellationToken, ValueTask<TSource>> accumulator, CancellationToken cancellationToken) => AggregateAwaitWithCancellationAsyncCore<TSource>(source, accumulator, cancellationToken);
-        public static ValueTask<TAccumulate> AggregateAwaitWithCancellationAsync<TSource, TAccumulate>(this IAsyncEnumerable<TSource> source, TAccumulate seed, Func<TAccumulate, TSource, CancellationToken, ValueTask<TAccumulate>> accumulator, CancellationToken cancellationToken) => AggregateAwaitWithCancellationAsyncCore<TSource, TAccumulate>(source, seed, accumulator, cancellationToken);
-        public static ValueTask<TResult> AggregateAwaitWithCancellationAsync<TSource, TAccumulate, TResult>(this IAsyncEnumerable<TSource> source, TAccumulate seed, Func<TAccumulate, TSource, CancellationToken, ValueTask<TAccumulate>> accumulator, Func<TAccumulate, CancellationToken, ValueTask<TResult>> resultSelector, CancellationToken cancellationToken) => AggregateAwaitWithCancellationAsyncCore<TSource, TAccumulate, TResult>(source, seed, accumulator, resultSelector, cancellationToken);
-        public static ValueTask<bool> AllAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => AllAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<bool> AnyAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => AnyAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<double?> AverageAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double?>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal?> AverageAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal?>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double> AverageAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double> AverageAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float> AverageAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double> AverageAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal> AverageAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double?> AverageAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int?>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double?> AverageAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long?>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float?> AverageAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float?>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<int> CountAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => CountAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<TSource> FirstAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => FirstAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<TSource> FirstOrDefaultAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => FirstOrDefaultAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<TSource> AggregateAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, TSource, CancellationToken, ValueTask<TSource>> accumulator, CancellationToken cancellationToken = default) => AggregateAwaitWithCancellationAsyncCore<TSource>(source, accumulator, cancellationToken);
+        public static ValueTask<TAccumulate> AggregateAwaitWithCancellationAsync<TSource, TAccumulate>(this IAsyncEnumerable<TSource> source, TAccumulate seed, Func<TAccumulate, TSource, CancellationToken, ValueTask<TAccumulate>> accumulator, CancellationToken cancellationToken = default) => AggregateAwaitWithCancellationAsyncCore<TSource, TAccumulate>(source, seed, accumulator, cancellationToken);
+        public static ValueTask<TResult> AggregateAwaitWithCancellationAsync<TSource, TAccumulate, TResult>(this IAsyncEnumerable<TSource> source, TAccumulate seed, Func<TAccumulate, TSource, CancellationToken, ValueTask<TAccumulate>> accumulator, Func<TAccumulate, CancellationToken, ValueTask<TResult>> resultSelector, CancellationToken cancellationToken = default) => AggregateAwaitWithCancellationAsyncCore<TSource, TAccumulate, TResult>(source, seed, accumulator, resultSelector, cancellationToken);
+        public static ValueTask<bool> AllAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => AllAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<bool> AnyAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => AnyAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<double> AverageAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int>> selector, CancellationToken cancellationToken = default) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double> AverageAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long>> selector, CancellationToken cancellationToken = default) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float> AverageAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float>> selector, CancellationToken cancellationToken = default) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double> AverageAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double>> selector, CancellationToken cancellationToken = default) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal> AverageAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal>> selector, CancellationToken cancellationToken = default) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double?> AverageAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int?>> selector, CancellationToken cancellationToken = default) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double?> AverageAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long?>> selector, CancellationToken cancellationToken = default) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float?> AverageAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float?>> selector, CancellationToken cancellationToken = default) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double?> AverageAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double?>> selector, CancellationToken cancellationToken = default) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal?> AverageAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal?>> selector, CancellationToken cancellationToken = default) => AverageAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<int> CountAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => CountAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<TSource> FirstAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => FirstAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<TSource> FirstOrDefaultAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => FirstOrDefaultAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
         public static Task ForEachAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, Task> action, CancellationToken cancellationToken) => ForEachAwaitWithCancellationAsyncCore<TSource>(source, action, cancellationToken);
         public static Task ForEachAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, int, CancellationToken, Task> action, CancellationToken cancellationToken) => ForEachAwaitWithCancellationAsyncCore<TSource>(source, action, cancellationToken);
         public static IAsyncEnumerable<IAsyncGrouping<TKey, TSource>> GroupByAwaitWithCancellation<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector) => GroupByAwaitWithCancellationCore<TSource, TKey>(source, keySelector);
+        public static IAsyncEnumerable<IAsyncGrouping<TKey, TSource>> GroupByAwaitWithCancellation<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer) => GroupByAwaitWithCancellationCore<TSource, TKey>(source, keySelector, comparer);
         public static IAsyncEnumerable<IAsyncGrouping<TKey, TElement>> GroupByAwaitWithCancellation<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector) => GroupByAwaitWithCancellationCore<TSource, TKey, TElement>(source, keySelector, elementSelector);
         public static IAsyncEnumerable<TResult> GroupByAwaitWithCancellation<TSource, TKey, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TKey, IAsyncEnumerable<TSource>, CancellationToken, ValueTask<TResult>> resultSelector) => GroupByAwaitWithCancellationCore<TSource, TKey, TResult>(source, keySelector, resultSelector);
-        public static IAsyncEnumerable<IAsyncGrouping<TKey, TSource>> GroupByAwaitWithCancellation<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer) => GroupByAwaitWithCancellationCore<TSource, TKey>(source, keySelector, comparer);
+        public static IAsyncEnumerable<TResult> GroupByAwaitWithCancellation<TSource, TKey, TElement, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, Func<TKey, IAsyncEnumerable<TElement>, CancellationToken, ValueTask<TResult>> resultSelector) => GroupByAwaitWithCancellationCore<TSource, TKey, TElement, TResult>(source, keySelector, elementSelector, resultSelector);
         public static IAsyncEnumerable<IAsyncGrouping<TKey, TElement>> GroupByAwaitWithCancellation<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, IEqualityComparer<TKey> comparer) => GroupByAwaitWithCancellationCore<TSource, TKey, TElement>(source, keySelector, elementSelector, comparer);
         public static IAsyncEnumerable<TResult> GroupByAwaitWithCancellation<TSource, TKey, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TKey, IAsyncEnumerable<TSource>, CancellationToken, ValueTask<TResult>> resultSelector, IEqualityComparer<TKey> comparer) => GroupByAwaitWithCancellationCore<TSource, TKey, TResult>(source, keySelector, resultSelector, comparer);
-        public static IAsyncEnumerable<TResult> GroupByAwaitWithCancellation<TSource, TKey, TElement, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, Func<TKey, IAsyncEnumerable<TElement>, CancellationToken, ValueTask<TResult>> resultSelector) => GroupByAwaitWithCancellationCore<TSource, TKey, TElement, TResult>(source, keySelector, elementSelector, resultSelector);
         public static IAsyncEnumerable<TResult> GroupByAwaitWithCancellation<TSource, TKey, TElement, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, Func<TKey, IAsyncEnumerable<TElement>, CancellationToken, ValueTask<TResult>> resultSelector, IEqualityComparer<TKey> comparer) => GroupByAwaitWithCancellationCore<TSource, TKey, TElement, TResult>(source, keySelector, elementSelector, resultSelector, comparer);
         public static IAsyncEnumerable<TResult> GroupJoinAwaitWithCancellation<TOuter, TInner, TKey, TResult>(this IAsyncEnumerable<TOuter> outer, IAsyncEnumerable<TInner> inner, Func<TOuter, CancellationToken, ValueTask<TKey>> outerKeySelector, Func<TInner, CancellationToken, ValueTask<TKey>> innerKeySelector, Func<TOuter, IAsyncEnumerable<TInner>, CancellationToken, ValueTask<TResult>> resultSelector) => GroupJoinAwaitWithCancellationCore<TOuter, TInner, TKey, TResult>(outer, inner, outerKeySelector, innerKeySelector, resultSelector);
         public static IAsyncEnumerable<TResult> GroupJoinAwaitWithCancellation<TOuter, TInner, TKey, TResult>(this IAsyncEnumerable<TOuter> outer, IAsyncEnumerable<TInner> inner, Func<TOuter, CancellationToken, ValueTask<TKey>> outerKeySelector, Func<TInner, CancellationToken, ValueTask<TKey>> innerKeySelector, Func<TOuter, IAsyncEnumerable<TInner>, CancellationToken, ValueTask<TResult>> resultSelector, IEqualityComparer<TKey> comparer) => GroupJoinAwaitWithCancellationCore<TOuter, TInner, TKey, TResult>(outer, inner, outerKeySelector, innerKeySelector, resultSelector, comparer);
         public static IAsyncEnumerable<TResult> JoinAwaitWithCancellation<TOuter, TInner, TKey, TResult>(this IAsyncEnumerable<TOuter> outer, IAsyncEnumerable<TInner> inner, Func<TOuter, CancellationToken, ValueTask<TKey>> outerKeySelector, Func<TInner, CancellationToken, ValueTask<TKey>> innerKeySelector, Func<TOuter, TInner, CancellationToken, ValueTask<TResult>> resultSelector) => JoinAwaitWithCancellationCore<TOuter, TInner, TKey, TResult>(outer, inner, outerKeySelector, innerKeySelector, resultSelector);
         public static IAsyncEnumerable<TResult> JoinAwaitWithCancellation<TOuter, TInner, TKey, TResult>(this IAsyncEnumerable<TOuter> outer, IAsyncEnumerable<TInner> inner, Func<TOuter, CancellationToken, ValueTask<TKey>> outerKeySelector, Func<TInner, CancellationToken, ValueTask<TKey>> innerKeySelector, Func<TOuter, TInner, CancellationToken, ValueTask<TResult>> resultSelector, IEqualityComparer<TKey> comparer) => JoinAwaitWithCancellationCore<TOuter, TInner, TKey, TResult>(outer, inner, outerKeySelector, innerKeySelector, resultSelector, comparer);
-        public static ValueTask<TSource> LastAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => LastAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<TSource> LastOrDefaultAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => LastOrDefaultAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<long> LongCountAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => LongCountAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<int> MaxAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<int?> MaxAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int?>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<long> MaxAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<long?> MaxAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long?>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float> MaxAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float?> MaxAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float?>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double> MaxAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double?> MaxAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double?>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal> MaxAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal?> MaxAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal?>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<TResult> MaxAwaitWithCancellationAsync<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TResult>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsyncCore<TSource, TResult>(source, selector, cancellationToken);
-        public static ValueTask<long?> MinAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long?>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float> MinAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float?> MinAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float?>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double> MinAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double?> MinAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double?>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal> MinAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal?> MinAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal?>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<TResult> MinAwaitWithCancellationAsync<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TResult>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsyncCore<TSource, TResult>(source, selector, cancellationToken);
-        public static ValueTask<int> MinAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<int?> MinAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int?>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<long> MinAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<TSource> LastAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => LastAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<TSource> LastOrDefaultAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => LastOrDefaultAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<long> LongCountAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => LongCountAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<long> MaxAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long>> selector, CancellationToken cancellationToken = default) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<long?> MaxAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long?>> selector, CancellationToken cancellationToken = default) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float> MaxAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float>> selector, CancellationToken cancellationToken = default) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float?> MaxAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float?>> selector, CancellationToken cancellationToken = default) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double> MaxAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double>> selector, CancellationToken cancellationToken = default) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double?> MaxAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double?>> selector, CancellationToken cancellationToken = default) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal> MaxAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal>> selector, CancellationToken cancellationToken = default) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal?> MaxAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal?>> selector, CancellationToken cancellationToken = default) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<TResult> MaxAwaitWithCancellationAsync<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TResult>> selector, CancellationToken cancellationToken = default) => MaxAwaitWithCancellationAsyncCore<TSource, TResult>(source, selector, cancellationToken);
+        public static ValueTask<int> MaxAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int>> selector, CancellationToken cancellationToken = default) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<int?> MaxAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int?>> selector, CancellationToken cancellationToken = default) => MaxAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double> MinAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double>> selector, CancellationToken cancellationToken = default) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double?> MinAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double?>> selector, CancellationToken cancellationToken = default) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal> MinAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal>> selector, CancellationToken cancellationToken = default) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal?> MinAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal?>> selector, CancellationToken cancellationToken = default) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<int> MinAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int>> selector, CancellationToken cancellationToken = default) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<int?> MinAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int?>> selector, CancellationToken cancellationToken = default) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<long> MinAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long>> selector, CancellationToken cancellationToken = default) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<long?> MinAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long?>> selector, CancellationToken cancellationToken = default) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float> MinAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float>> selector, CancellationToken cancellationToken = default) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float?> MinAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float?>> selector, CancellationToken cancellationToken = default) => MinAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<TResult> MinAwaitWithCancellationAsync<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TResult>> selector, CancellationToken cancellationToken = default) => MinAwaitWithCancellationAsyncCore<TSource, TResult>(source, selector, cancellationToken);
         public static IOrderedAsyncEnumerable<TSource> OrderByAwaitWithCancellation<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector) => OrderByAwaitWithCancellationCore<TSource, TKey>(source, keySelector);
         public static IOrderedAsyncEnumerable<TSource> OrderByAwaitWithCancellation<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, IComparer<TKey> comparer) => OrderByAwaitWithCancellationCore<TSource, TKey>(source, keySelector, comparer);
         public static IOrderedAsyncEnumerable<TSource> OrderByDescendingAwaitWithCancellation<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector) => OrderByDescendingAwaitWithCancellationCore<TSource, TKey>(source, keySelector);
@@ -378,34 +378,34 @@ namespace System.Linq
         public static IAsyncEnumerable<TResult> SelectManyAwaitWithCancellation<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, int, CancellationToken, ValueTask<IAsyncEnumerable<TResult>>> selector) => SelectManyAwaitWithCancellationCore<TSource, TResult>(source, selector);
         public static IAsyncEnumerable<TResult> SelectManyAwaitWithCancellation<TSource, TCollection, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<IAsyncEnumerable<TCollection>>> collectionSelector, Func<TSource, TCollection, CancellationToken, ValueTask<TResult>> resultSelector) => SelectManyAwaitWithCancellationCore<TSource, TCollection, TResult>(source, collectionSelector, resultSelector);
         public static IAsyncEnumerable<TResult> SelectManyAwaitWithCancellation<TSource, TCollection, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, int, CancellationToken, ValueTask<IAsyncEnumerable<TCollection>>> collectionSelector, Func<TSource, TCollection, CancellationToken, ValueTask<TResult>> resultSelector) => SelectManyAwaitWithCancellationCore<TSource, TCollection, TResult>(source, collectionSelector, resultSelector);
-        public static ValueTask<TSource> SingleAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => SingleAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
-        public static ValueTask<TSource> SingleOrDefaultAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => SingleOrDefaultAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<TSource> SingleAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => SingleAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
+        public static ValueTask<TSource> SingleOrDefaultAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken = default) => SingleOrDefaultAwaitWithCancellationAsyncCore<TSource>(source, predicate, cancellationToken);
         public static IAsyncEnumerable<TSource> SkipWhileAwaitWithCancellation<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate) => SkipWhileAwaitWithCancellationCore<TSource>(source, predicate);
         public static IAsyncEnumerable<TSource> SkipWhileAwaitWithCancellation<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, int, CancellationToken, ValueTask<bool>> predicate) => SkipWhileAwaitWithCancellationCore<TSource>(source, predicate);
-        public static ValueTask<double> SumAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal> SumAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<int?> SumAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int?>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<long?> SumAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long?>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float?> SumAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float?>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<double?> SumAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double?>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<decimal?> SumAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal?>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<int> SumAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<long> SumAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
-        public static ValueTask<float> SumAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<int?> SumAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int?>> selector, CancellationToken cancellationToken = default) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<long?> SumAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long?>> selector, CancellationToken cancellationToken = default) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float?> SumAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float?>> selector, CancellationToken cancellationToken = default) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double?> SumAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double?>> selector, CancellationToken cancellationToken = default) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal?> SumAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal?>> selector, CancellationToken cancellationToken = default) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<int> SumAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int>> selector, CancellationToken cancellationToken = default) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<long> SumAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long>> selector, CancellationToken cancellationToken = default) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<float> SumAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float>> selector, CancellationToken cancellationToken = default) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<double> SumAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double>> selector, CancellationToken cancellationToken = default) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
+        public static ValueTask<decimal> SumAwaitWithCancellationAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal>> selector, CancellationToken cancellationToken = default) => SumAwaitWithCancellationAsyncCore<TSource>(source, selector, cancellationToken);
         public static IAsyncEnumerable<TSource> TakeWhileAwaitWithCancellation<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate) => TakeWhileAwaitWithCancellationCore<TSource>(source, predicate);
         public static IAsyncEnumerable<TSource> TakeWhileAwaitWithCancellation<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, int, CancellationToken, ValueTask<bool>> predicate) => TakeWhileAwaitWithCancellationCore<TSource>(source, predicate);
         public static IOrderedAsyncEnumerable<TSource> ThenByAwaitWithCancellation<TSource, TKey>(this IOrderedAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector) => ThenByAwaitWithCancellationCore<TSource, TKey>(source, keySelector);
         public static IOrderedAsyncEnumerable<TSource> ThenByAwaitWithCancellation<TSource, TKey>(this IOrderedAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, IComparer<TKey> comparer) => ThenByAwaitWithCancellationCore<TSource, TKey>(source, keySelector, comparer);
         public static IOrderedAsyncEnumerable<TSource> ThenByDescendingAwaitWithCancellation<TSource, TKey>(this IOrderedAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector) => ThenByDescendingAwaitWithCancellationCore<TSource, TKey>(source, keySelector);
         public static IOrderedAsyncEnumerable<TSource> ThenByDescendingAwaitWithCancellation<TSource, TKey>(this IOrderedAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, IComparer<TKey> comparer) => ThenByDescendingAwaitWithCancellationCore<TSource, TKey>(source, keySelector, comparer);
-        public static ValueTask<Dictionary<TKey, TSource>> ToDictionaryAwaitWithCancellationAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, CancellationToken cancellationToken) => ToDictionaryAwaitWithCancellationAsyncCore<TSource, TKey>(source, keySelector, cancellationToken);
-        public static ValueTask<Dictionary<TKey, TSource>> ToDictionaryAwaitWithCancellationAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken) => ToDictionaryAwaitWithCancellationAsyncCore<TSource, TKey>(source, keySelector, comparer, cancellationToken);
-        public static ValueTask<Dictionary<TKey, TElement>> ToDictionaryAwaitWithCancellationAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, CancellationToken cancellationToken) => ToDictionaryAwaitWithCancellationAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, cancellationToken);
-        public static ValueTask<Dictionary<TKey, TElement>> ToDictionaryAwaitWithCancellationAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken) => ToDictionaryAwaitWithCancellationAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, comparer, cancellationToken);
-        public static ValueTask<ILookup<TKey, TSource>> ToLookupAwaitWithCancellationAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, CancellationToken cancellationToken) => ToLookupAwaitWithCancellationAsyncCore<TSource, TKey>(source, keySelector, cancellationToken);
-        public static ValueTask<ILookup<TKey, TSource>> ToLookupAwaitWithCancellationAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken) => ToLookupAwaitWithCancellationAsyncCore<TSource, TKey>(source, keySelector, comparer, cancellationToken);
-        public static ValueTask<ILookup<TKey, TElement>> ToLookupAwaitWithCancellationAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, CancellationToken cancellationToken) => ToLookupAwaitWithCancellationAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, cancellationToken);
-        public static ValueTask<ILookup<TKey, TElement>> ToLookupAwaitWithCancellationAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken) => ToLookupAwaitWithCancellationAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, comparer, cancellationToken);
+        public static ValueTask<Dictionary<TKey, TSource>> ToDictionaryAwaitWithCancellationAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, CancellationToken cancellationToken = default) => ToDictionaryAwaitWithCancellationAsyncCore<TSource, TKey>(source, keySelector, cancellationToken);
+        public static ValueTask<Dictionary<TKey, TSource>> ToDictionaryAwaitWithCancellationAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken = default) => ToDictionaryAwaitWithCancellationAsyncCore<TSource, TKey>(source, keySelector, comparer, cancellationToken);
+        public static ValueTask<Dictionary<TKey, TElement>> ToDictionaryAwaitWithCancellationAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, CancellationToken cancellationToken = default) => ToDictionaryAwaitWithCancellationAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, cancellationToken);
+        public static ValueTask<Dictionary<TKey, TElement>> ToDictionaryAwaitWithCancellationAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken = default) => ToDictionaryAwaitWithCancellationAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, comparer, cancellationToken);
+        public static ValueTask<ILookup<TKey, TSource>> ToLookupAwaitWithCancellationAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, CancellationToken cancellationToken = default) => ToLookupAwaitWithCancellationAsyncCore<TSource, TKey>(source, keySelector, cancellationToken);
+        public static ValueTask<ILookup<TKey, TElement>> ToLookupAwaitWithCancellationAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, CancellationToken cancellationToken = default) => ToLookupAwaitWithCancellationAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, cancellationToken);
+        public static ValueTask<ILookup<TKey, TSource>> ToLookupAwaitWithCancellationAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken = default) => ToLookupAwaitWithCancellationAsyncCore<TSource, TKey>(source, keySelector, comparer, cancellationToken);
+        public static ValueTask<ILookup<TKey, TElement>> ToLookupAwaitWithCancellationAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken = default) => ToLookupAwaitWithCancellationAsyncCore<TSource, TKey, TElement>(source, keySelector, elementSelector, comparer, cancellationToken);
         public static IAsyncEnumerable<TSource> WhereAwaitWithCancellation<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate) => WhereAwaitWithCancellationCore<TSource>(source, predicate);
         public static IAsyncEnumerable<TSource> WhereAwaitWithCancellation<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, int, CancellationToken, ValueTask<bool>> predicate) => WhereAwaitWithCancellationCore<TSource>(source, predicate);
         public static IAsyncEnumerable<TResult> ZipAwaitWithCancellation<TFirst, TSecond, TResult>(this IAsyncEnumerable<TFirst> first, IAsyncEnumerable<TSecond> second, Func<TFirst, TSecond, CancellationToken, ValueTask<TResult>> selector) => ZipAwaitWithCancellationCore<TFirst, TSecond, TResult>(first, second, selector);

+ 12 - 2
Ix.NET/Source/System.Linq.Async/System/Linq/AsyncEnumerable.AsyncOverloads.tt

@@ -65,6 +65,16 @@ toCSharp = t =>
         return t.Name;
     }
 };
+
+Func<ParameterInfo, string> getOptionalSuffix = p =>
+{
+    if (p.IsOptional)
+    {
+        return " = default";
+    }
+
+    return "";
+};
 #>
 using System.Collections.Generic;
 using System.Threading;
@@ -97,7 +107,7 @@ foreach (var g in asyncMethods.GroupBy(m => m.Name.Contains("WithCancellation"))
         var genArgs = m.IsGenericMethod ? "<" + string.Join(", ", m.GetGenericArguments().Select(t => t.Name)) + ">" : "";
         var returnType = toCSharp(m.ReturnType);
         var isExtension = m.IsDefined(typeof(System.Runtime.CompilerServices.ExtensionAttribute), true);
-        var pars = (isExtension ? "this " : "") + string.Join(", ", m.GetParameters().Select(p => toCSharp(p.ParameterType) + " " + p.Name));
+        var pars = (isExtension ? "this " : "") + string.Join(", ", m.GetParameters().Select(p => toCSharp(p.ParameterType) + " " + p.Name + getOptionalSuffix(p)));
         var args = string.Join(", ", m.GetParameters().Select(p => p.Name));
 #>
         public static <#=returnType#> <#=shortName#><#=genArgs#>(<#=pars#>) => <#=longName#><#=genArgs#>(<#=args#>);
@@ -131,7 +141,7 @@ foreach (var g in asyncMethods.GroupBy(m => m.Name.Contains("WithCancellation"))
         var genArgs = m.IsGenericMethod ? "<" + string.Join(", ", m.GetGenericArguments().Select(t => t.Name)) + ">" : "";
         var returnType = toCSharp(m.ReturnType);
         var isExtension = m.IsDefined(typeof(System.Runtime.CompilerServices.ExtensionAttribute), true);
-        var pars = (isExtension ? "this " : "") + string.Join(", ", m.GetParameters().Select(p => toCSharp(p.ParameterType) + " " + p.Name));
+        var pars = (isExtension ? "this " : "") + string.Join(", ", m.GetParameters().Select(p => toCSharp(p.ParameterType) + " " + p.Name + getOptionalSuffix(p)));
         var args = string.Join(", ", m.GetParameters().Select(p => p.Name));
 #>
         public static <#=returnType#> <#=shortName#><#=genArgs#>(<#=pars#>) => <#=longName#><#=genArgs#>(<#=args#>);