Remove AETOR_HAS_CT checks. CancellationToken is now supported on the interface.

Ix.NET/Source/System.Linq.Async/System/Linq/AsyncEnumerableHelpers.cs

@@ -162,7 +162,7 @@ namespace System.Collections.Generic
         {
             var set = new Set<T>(comparer);
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
             await foreach (T item in source.WithCancellation(cancellationToken).ConfigureAwait(false))
             {
                 set.Add(item);

Ix.NET/Source/System.Linq.Async/System/Linq/Operators/Aggregate.cs

@@ -190,7 +190,7 @@ namespace System.Linq
             {
                 var acc = _seed;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     acc = _accumulator(acc, item);
@@ -228,7 +228,7 @@ namespace System.Linq
             {
                 var acc = _seed;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     acc = await _accumulator(acc, item).ConfigureAwait(false);
@@ -267,7 +267,7 @@ namespace System.Linq
             {
                 var acc = _seed;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     acc = await _accumulator(acc, item, _cancellationToken).ConfigureAwait(false);
@@ -308,7 +308,7 @@ namespace System.Linq
             {
                 var acc = _seed;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     acc = _accumulator(acc, item);
@@ -348,7 +348,7 @@ namespace System.Linq
             {
                 var acc = _seed;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     acc = await _accumulator(acc, item).ConfigureAwait(false);
@@ -389,7 +389,7 @@ namespace System.Linq
             {
                 var acc = _seed;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     acc = await _accumulator(acc, item, _cancellationToken).ConfigureAwait(false);

Ix.NET/Source/System.Linq.Async/System/Linq/Operators/All.cs

@@ -21,7 +21,7 @@ namespace System.Linq
 
             async Task<bool> Core(IAsyncEnumerable<TSource> _source, Func<TSource, bool> _predicate, CancellationToken _cancellationToken)
             {
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     if (!_predicate(item))
@@ -61,7 +61,7 @@ namespace System.Linq
 
             async Task<bool> Core(IAsyncEnumerable<TSource> _source, Func<TSource, ValueTask<bool>> _predicate, CancellationToken _cancellationToken)
             {
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
 
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
@@ -103,7 +103,7 @@ namespace System.Linq
 
             async Task<bool> Core(IAsyncEnumerable<TSource> _source, Func<TSource, CancellationToken, ValueTask<bool>> _predicate, CancellationToken _cancellationToken)
             {
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
 
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {

Ix.NET/Source/System.Linq.Async/System/Linq/Operators/Any.cs

@@ -50,7 +50,7 @@ namespace System.Linq
 
             async Task<bool> Core(IAsyncEnumerable<TSource> _source, Func<TSource, bool> _predicate, CancellationToken _cancellationToken)
             {
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     if (_predicate(item))
@@ -90,7 +90,7 @@ namespace System.Linq
 
             async Task<bool> Core(IAsyncEnumerable<TSource> _source, Func<TSource, ValueTask<bool>> _predicate, CancellationToken _cancellationToken)
             {
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     if (await _predicate(item).ConfigureAwait(false))
@@ -131,7 +131,7 @@ namespace System.Linq
 
             async Task<bool> Core(IAsyncEnumerable<TSource> _source, Func<TSource, CancellationToken, ValueTask<bool>> _predicate, CancellationToken _cancellationToken)
             {
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     if (await _predicate(item, _cancellationToken).ConfigureAwait(false))

Ix.NET/Source/System.Linq.Async/System/Linq/Operators/AppendPrepend.cs

@@ -206,7 +206,7 @@ namespace System.Linq
                 }
                 else
                 {
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                     await foreach (TSource item in _source.WithCancellation(cancellationToken).ConfigureAwait(false))
                     {
                         array[index] = item;
@@ -251,7 +251,7 @@ namespace System.Linq
                     list.Add(_item);
                 }
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(cancellationToken).ConfigureAwait(false))
                 {
                     list.Add(item);
@@ -428,7 +428,7 @@ namespace System.Linq
                 }
                 else
                 {
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                     await foreach (TSource item in _source.WithCancellation(cancellationToken).ConfigureAwait(false))
                     {
                         array[index] = item;
@@ -471,7 +471,7 @@ namespace System.Linq
                     list.Add(n.Item);
                 }
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(cancellationToken).ConfigureAwait(false))
                 {
                     list.Add(item);

Ix.NET/Source/System.Linq.Async/System/Linq/Operators/Concat.cs

@@ -84,7 +84,7 @@ namespace System.Linq
                         break;
                     }
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                     await foreach (TSource item in source.WithCancellation(cancellationToken).ConfigureAwait(false))
                     {
                         list.Add(item);

Ix.NET/Source/System.Linq.Async/System/Linq/Operators/Contains.cs

@@ -28,7 +28,7 @@ namespace System.Linq
 
                 async Task<bool> Core(IAsyncEnumerable<TSource> _source, TSource _value, CancellationToken _cancellationToken)
                 {
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                     await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                     {
                         if (EqualityComparer<TSource>.Default.Equals(item, _value))
@@ -64,7 +64,7 @@ namespace System.Linq
 
                 async Task<bool> Core(IAsyncEnumerable<TSource> _source, TSource _value, IEqualityComparer<TSource> _comparer, CancellationToken _cancellationToken)
                 {
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                     await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                     {
                         if (_comparer.Equals(item, _value))

Ix.NET/Source/System.Linq.Async/System/Linq/Operators/Count.cs

@@ -32,7 +32,7 @@ namespace System.Linq
             {
                 var count = 0;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     checked
@@ -76,7 +76,7 @@ namespace System.Linq
             {
                 var count = 0;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     if (_predicate(item))
@@ -126,7 +126,7 @@ namespace System.Linq
             {
                 var count = 0;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     if (await _predicate(item).ConfigureAwait(false))
@@ -177,7 +177,7 @@ namespace System.Linq
             {
                 var count = 0;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     if (await _predicate(item, _cancellationToken).ConfigureAwait(false))

Ix.NET/Source/System.Linq.Async/System/Linq/Operators/ElementAt.cs

@@ -37,7 +37,7 @@ namespace System.Linq
 
                     if (_index >= 0)
                     {
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                         await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                         {
                             if (_index == 0)

Ix.NET/Source/System.Linq.Async/System/Linq/Operators/ElementAtOrDefault.cs

@@ -40,7 +40,7 @@ namespace System.Linq
                     }
                     else
                     {
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                         await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                         {
                             if (_index == 0)

Ix.NET/Source/System.Linq.Async/System/Linq/Operators/ForEach.cs

@@ -28,7 +28,7 @@ namespace System.Linq
 
             async Task Core(IAsyncEnumerable<TSource> _source, Action<TSource> _action, CancellationToken _cancellationToken)
             {
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     _action(item);
@@ -64,7 +64,7 @@ namespace System.Linq
             {
                 var index = 0;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     _action(item, checked(index++));
@@ -98,7 +98,7 @@ namespace System.Linq
 
             async Task Core(IAsyncEnumerable<TSource> _source, Func<TSource, Task> _action, CancellationToken _cancellationToken)
             {
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     await _action(item).ConfigureAwait(false);
@@ -127,7 +127,7 @@ namespace System.Linq
 
             async Task Core(IAsyncEnumerable<TSource> _source, Func<TSource, CancellationToken, Task> _action, CancellationToken _cancellationToken)
             {
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     await _action(item, _cancellationToken).ConfigureAwait(false);
@@ -163,7 +163,7 @@ namespace System.Linq
             {
                 var index = 0;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     await _action(item, checked(index++)).ConfigureAwait(false);
@@ -199,7 +199,7 @@ namespace System.Linq
             {
                 var index = 0;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     await _action(item, checked(index++), _cancellationToken).ConfigureAwait(false);

Ix.NET/Source/System.Linq.Async/System/Linq/Operators/LastOrDefault.cs

@@ -101,7 +101,7 @@ namespace System.Linq
                     var last = default(TSource);
                     var hasLast = false;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                     await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                     {
                         hasLast = true;
@@ -136,7 +136,7 @@ namespace System.Linq
             var last = default(TSource);
             var hasLast = false;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
             await foreach (TSource item in source.WithCancellation(cancellationToken).ConfigureAwait(false))
             {
                 if (predicate(item))
@@ -175,7 +175,7 @@ namespace System.Linq
             var last = default(TSource);
             var hasLast = false;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
             await foreach (TSource item in source.WithCancellation(cancellationToken).ConfigureAwait(false))
             {
                 if (await predicate(item).ConfigureAwait(false))
@@ -215,7 +215,7 @@ namespace System.Linq
             var last = default(TSource);
             var hasLast = false;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
             await foreach (TSource item in source.WithCancellation(cancellationToken).ConfigureAwait(false))
             {
                 if (await predicate(item, cancellationToken).ConfigureAwait(false))

Ix.NET/Source/System.Linq.Async/System/Linq/Operators/LongCount.cs

@@ -21,7 +21,7 @@ namespace System.Linq
             {
                 var count = 0L;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     checked
@@ -65,7 +65,7 @@ namespace System.Linq
             {
                 var count = 0L;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     if (_predicate(item))
@@ -115,7 +115,7 @@ namespace System.Linq
             {
                 var count = 0L;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     if (await _predicate(item).ConfigureAwait(false))
@@ -166,7 +166,7 @@ namespace System.Linq
             {
                 var count = 0L;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     if (await _predicate(item, _cancellationToken).ConfigureAwait(false))

Ix.NET/Source/System.Linq.Async/System/Linq/Operators/Lookup.cs

@@ -91,7 +91,7 @@ namespace System.Linq.Internal
 
             var lookup = new Lookup<TKey, TElement>(comparer);
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
             await foreach (TSource item in source.WithCancellation(cancellationToken).ConfigureAwait(false))
             {
                 var key = keySelector(item);
@@ -132,7 +132,7 @@ namespace System.Linq.Internal
 
             var lookup = new Lookup<TKey, TElement>(comparer);
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
             await foreach (TElement item in source.WithCancellation(cancellationToken).ConfigureAwait(false))
             {
                 var key = keySelector(item);
@@ -164,7 +164,7 @@ namespace System.Linq.Internal
         {
             var lookup = new Lookup<TKey, TElement>(comparer);
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
             await foreach (TElement item in source.WithCancellation(cancellationToken).ConfigureAwait(false))
             {
                 var key = keySelector(item);
@@ -419,7 +419,7 @@ namespace System.Linq.Internal
 
             var lookup = new LookupWithTask<TKey, TElement>(comparer);
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
             await foreach (TSource item in source.WithCancellation(cancellationToken).ConfigureAwait(false))
             {
                 var key = await keySelector(item).ConfigureAwait(false);
@@ -462,7 +462,7 @@ namespace System.Linq.Internal
 
             var lookup = new LookupWithTask<TKey, TElement>(comparer);
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
             await foreach (TSource item in source.WithCancellation(cancellationToken).ConfigureAwait(false))
             {
                 var key = await keySelector(item, cancellationToken).ConfigureAwait(false);
@@ -504,7 +504,7 @@ namespace System.Linq.Internal
 
             var lookup = new LookupWithTask<TKey, TElement>(comparer);
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
             await foreach (TElement item in source.WithCancellation(cancellationToken).ConfigureAwait(false))
             {
                 var key = await keySelector(item).ConfigureAwait(false);
@@ -540,7 +540,7 @@ namespace System.Linq.Internal
 
             var lookup = new LookupWithTask<TKey, TElement>(comparer);
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
             await foreach (TElement item in source.WithCancellation(cancellationToken).ConfigureAwait(false))
             {
                 var key = await keySelector(item, cancellationToken).ConfigureAwait(false);
@@ -573,7 +573,7 @@ namespace System.Linq.Internal
         {
             var lookup = new LookupWithTask<TKey, TElement>(comparer);
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
             await foreach (TElement item in source.WithCancellation(cancellationToken).ConfigureAwait(false))
             {
                 var key = await keySelector(item).ConfigureAwait(false);
@@ -612,7 +612,7 @@ namespace System.Linq.Internal
         {
             var lookup = new LookupWithTask<TKey, TElement>(comparer);
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
             await foreach (TElement item in source.WithCancellation(cancellationToken).ConfigureAwait(false))
             {
                 var key = await keySelector(item, cancellationToken).ConfigureAwait(false);

Ix.NET/Source/System.Linq.Async/System/Linq/Operators/SelectMany.cs

@@ -402,7 +402,7 @@ namespace System.Linq
                 {
                     var count = 0;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                     await foreach (var element in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                     {
                         checked
@@ -446,7 +446,7 @@ namespace System.Linq
             {
                 var list = new List<TResult>();
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (var element in _source.WithCancellation(cancellationToken).ConfigureAwait(false))
                 {
                     var items = _selector(element);
@@ -578,7 +578,7 @@ namespace System.Linq
                 {
                     var count = 0;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                     await foreach (var element in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                     {
                         var items = await _selector(element).ConfigureAwait(false);
@@ -626,7 +626,7 @@ namespace System.Linq
             {
                 var list = new List<TResult>();
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (var element in _source.WithCancellation(cancellationToken).ConfigureAwait(false))
                 {
                     var items = await _selector(element).ConfigureAwait(false);
@@ -759,7 +759,7 @@ namespace System.Linq
                 {
                     var count = 0;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                     await foreach (var element in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                     {
                         var items = await _selector(element, _cancellationToken).ConfigureAwait(false);
@@ -807,7 +807,7 @@ namespace System.Linq
             {
                 var list = new List<TResult>();
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (var element in _source.WithCancellation(cancellationToken).ConfigureAwait(false))
                 {
                     var items = await _selector(element, cancellationToken).ConfigureAwait(false);

Ix.NET/Source/System.Linq.Async/System/Linq/Operators/Sum.Generated.cs

@@ -21,7 +21,7 @@ namespace System.Linq
             {
                 var sum = 0;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (int value in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     checked
@@ -65,7 +65,7 @@ namespace System.Linq
             {
                 var sum = 0;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = _selector(item);
@@ -113,7 +113,7 @@ namespace System.Linq
             {
                 var sum = 0;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = await _selector(item).ConfigureAwait(false);
@@ -162,7 +162,7 @@ namespace System.Linq
             {
                 var sum = 0;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = await _selector(item, _cancellationToken).ConfigureAwait(false);
@@ -209,7 +209,7 @@ namespace System.Linq
             {
                 var sum = 0L;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (long value in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     checked
@@ -253,7 +253,7 @@ namespace System.Linq
             {
                 var sum = 0L;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = _selector(item);
@@ -301,7 +301,7 @@ namespace System.Linq
             {
                 var sum = 0L;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = await _selector(item).ConfigureAwait(false);
@@ -350,7 +350,7 @@ namespace System.Linq
             {
                 var sum = 0L;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = await _selector(item, _cancellationToken).ConfigureAwait(false);
@@ -397,7 +397,7 @@ namespace System.Linq
             {
                 var sum = 0.0f;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (float value in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     sum += value;
@@ -435,7 +435,7 @@ namespace System.Linq
             {
                 var sum = 0.0f;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = _selector(item);
@@ -477,7 +477,7 @@ namespace System.Linq
             {
                 var sum = 0.0f;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = await _selector(item).ConfigureAwait(false);
@@ -520,7 +520,7 @@ namespace System.Linq
             {
                 var sum = 0.0f;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = await _selector(item, _cancellationToken).ConfigureAwait(false);
@@ -561,7 +561,7 @@ namespace System.Linq
             {
                 var sum = 0.0;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (double value in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     sum += value;
@@ -599,7 +599,7 @@ namespace System.Linq
             {
                 var sum = 0.0;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = _selector(item);
@@ -641,7 +641,7 @@ namespace System.Linq
             {
                 var sum = 0.0;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = await _selector(item).ConfigureAwait(false);
@@ -684,7 +684,7 @@ namespace System.Linq
             {
                 var sum = 0.0;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = await _selector(item, _cancellationToken).ConfigureAwait(false);
@@ -725,7 +725,7 @@ namespace System.Linq
             {
                 var sum = 0m;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (decimal value in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     sum += value;
@@ -763,7 +763,7 @@ namespace System.Linq
             {
                 var sum = 0m;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = _selector(item);
@@ -805,7 +805,7 @@ namespace System.Linq
             {
                 var sum = 0m;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = await _selector(item).ConfigureAwait(false);
@@ -848,7 +848,7 @@ namespace System.Linq
             {
                 var sum = 0m;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = await _selector(item, _cancellationToken).ConfigureAwait(false);
@@ -889,7 +889,7 @@ namespace System.Linq
             {
                 var sum = 0;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (int? value in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     checked
@@ -933,7 +933,7 @@ namespace System.Linq
             {
                 var sum = 0;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = _selector(item);
@@ -981,7 +981,7 @@ namespace System.Linq
             {
                 var sum = 0;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = await _selector(item).ConfigureAwait(false);
@@ -1030,7 +1030,7 @@ namespace System.Linq
             {
                 var sum = 0;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = await _selector(item, _cancellationToken).ConfigureAwait(false);
@@ -1077,7 +1077,7 @@ namespace System.Linq
             {
                 var sum = 0L;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (long? value in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     checked
@@ -1121,7 +1121,7 @@ namespace System.Linq
             {
                 var sum = 0L;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = _selector(item);
@@ -1169,7 +1169,7 @@ namespace System.Linq
             {
                 var sum = 0L;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = await _selector(item).ConfigureAwait(false);
@@ -1218,7 +1218,7 @@ namespace System.Linq
             {
                 var sum = 0L;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = await _selector(item, _cancellationToken).ConfigureAwait(false);
@@ -1265,7 +1265,7 @@ namespace System.Linq
             {
                 var sum = 0.0f;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (float? value in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     sum += value.GetValueOrDefault();
@@ -1303,7 +1303,7 @@ namespace System.Linq
             {
                 var sum = 0.0f;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = _selector(item);
@@ -1345,7 +1345,7 @@ namespace System.Linq
             {
                 var sum = 0.0f;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = await _selector(item).ConfigureAwait(false);
@@ -1388,7 +1388,7 @@ namespace System.Linq
             {
                 var sum = 0.0f;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = await _selector(item, _cancellationToken).ConfigureAwait(false);
@@ -1429,7 +1429,7 @@ namespace System.Linq
             {
                 var sum = 0.0;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (double? value in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     sum += value.GetValueOrDefault();
@@ -1467,7 +1467,7 @@ namespace System.Linq
             {
                 var sum = 0.0;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = _selector(item);
@@ -1509,7 +1509,7 @@ namespace System.Linq
             {
                 var sum = 0.0;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = await _selector(item).ConfigureAwait(false);
@@ -1552,7 +1552,7 @@ namespace System.Linq
             {
                 var sum = 0.0;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = await _selector(item, _cancellationToken).ConfigureAwait(false);
@@ -1593,7 +1593,7 @@ namespace System.Linq
             {
                 var sum = 0m;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (decimal? value in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     sum += value.GetValueOrDefault();
@@ -1631,7 +1631,7 @@ namespace System.Linq
             {
                 var sum = 0m;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = _selector(item);
@@ -1673,7 +1673,7 @@ namespace System.Linq
             {
                 var sum = 0m;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = await _selector(item).ConfigureAwait(false);
@@ -1716,7 +1716,7 @@ namespace System.Linq
             {
                 var sum = 0m;
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var value = await _selector(item, _cancellationToken).ConfigureAwait(false);

Ix.NET/Source/System.Linq.Async/System/Linq/Operators/ToDictionary.cs

@@ -26,7 +26,7 @@ namespace System.Linq
             {
                 var d = new Dictionary<TKey, TSource>(_comparer);
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in source.WithCancellation(cancellationToken).ConfigureAwait(false))
                 {
                     var key = _keySelector(item);
@@ -73,7 +73,7 @@ namespace System.Linq
             {
                 var d = new Dictionary<TKey, TSource>(_comparer);
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var key = await _keySelector(item).ConfigureAwait(false);
@@ -121,7 +121,7 @@ namespace System.Linq
             {
                 var d = new Dictionary<TKey, TSource>(_comparer);
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var key = await _keySelector(item, _cancellationToken).ConfigureAwait(false);
@@ -171,7 +171,7 @@ namespace System.Linq
             {
                 var d = new Dictionary<TKey, TElement>(_comparer);
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var key = _keySelector(item);
@@ -222,7 +222,7 @@ namespace System.Linq
             {
                 var d = new Dictionary<TKey, TElement>(_comparer);
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var key = await _keySelector(item).ConfigureAwait(false);
@@ -274,7 +274,7 @@ namespace System.Linq
             {
                 var d = new Dictionary<TKey, TElement>(_comparer);
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     var key = await _keySelector(item, _cancellationToken).ConfigureAwait(false);

Ix.NET/Source/System.Linq.Async/System/Linq/Operators/ToHashSet.cs

@@ -24,7 +24,7 @@ namespace System.Linq
             {
                 var set = new HashSet<TSource>(_comparer);
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     set.Add(item);

Ix.NET/Source/System.Linq.Async/System/Linq/Operators/ToList.cs

@@ -24,7 +24,7 @@ namespace System.Linq
             {
                 var list = new List<TSource>();
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                 await foreach (TSource item in _source.WithCancellation(_cancellationToken).ConfigureAwait(false))
                 {
                     list.Add(item);

Ix.NET/Source/System.Linq.Async/System/Linq/Operators/Union.cs

@@ -162,7 +162,7 @@ namespace System.Linq
                         return set;
                     }
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
                     await foreach (TSource item in enumerable.WithCancellation(cancellationToken).ConfigureAwait(false))
                     {
                         set.Add(item);

Ix.NET/Source/System.Linq.Async/System/Linq/Operators/Utilities.cs

@@ -38,7 +38,7 @@ namespace System.Linq
                 }
             }
 
-#if CSHARP8 && AETOR_HAS_CT // CS0656 Missing compiler required member 'System.Collections.Generic.IAsyncEnumerable`1.GetAsyncEnumerator'
+#if CSHARP8
             await foreach (var item in collection.WithCancellation(cancellationToken).ConfigureAwait(false))
             {
                 list.Add(item);