Reordering overloads of Intersect.

Ix.NET/Source/System.Interactive.Async/Intersect.cs

@@ -10,27 +10,26 @@ namespace System.Linq
 {
     public static partial class AsyncEnumerable
     {
-        public static IAsyncEnumerable<TSource> Intersect<TSource>(this IAsyncEnumerable<TSource> first, IAsyncEnumerable<TSource> second, IEqualityComparer<TSource> comparer)
+        public static IAsyncEnumerable<TSource> Intersect<TSource>(this IAsyncEnumerable<TSource> first, IAsyncEnumerable<TSource> second)
         {
             if (first == null)
                 throw new ArgumentNullException(nameof(first));
             if (second == null)
                 throw new ArgumentNullException(nameof(second));
-            if (comparer == null)
-                throw new ArgumentNullException(nameof(comparer));
 
-            return new IntersectAsyncIterator<TSource>(first, second, comparer);
+            return first.Intersect(second, EqualityComparer<TSource>.Default);
         }
 
-
-        public static IAsyncEnumerable<TSource> Intersect<TSource>(this IAsyncEnumerable<TSource> first, IAsyncEnumerable<TSource> second)
+        public static IAsyncEnumerable<TSource> Intersect<TSource>(this IAsyncEnumerable<TSource> first, IAsyncEnumerable<TSource> second, IEqualityComparer<TSource> comparer)
         {
             if (first == null)
                 throw new ArgumentNullException(nameof(first));
             if (second == null)
                 throw new ArgumentNullException(nameof(second));
+            if (comparer == null)
+                throw new ArgumentNullException(nameof(comparer));
 
-            return first.Intersect(second, EqualityComparer<TSource>.Default);
+            return new IntersectAsyncIterator<TSource>(first, second, comparer);
         }
 
         private sealed class IntersectAsyncIterator<TSource> : AsyncIterator<TSource>