Move IsEmpty to AsyncEnumerableEx.

Ix.NET/Source/System.Interactive.Async.Tests/AsyncTests.Creation.cs

@@ -52,8 +52,8 @@ namespace Tests
         [Fact]
         public async Task Empty_Null()
         {
-            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.IsEmpty<int>(null));
-            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.IsEmpty<int>(null, CancellationToken.None));
+            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerableEx.IsEmpty<int>(null));
+            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerableEx.IsEmpty<int>(null, CancellationToken.None));
         }
 
         [Fact]

Ix.NET/Source/System.Linq.Async/System/Linq/Operators/IsEmpty.cs → Ix.NET/Source/System.Interactive.Async/System/Linq/Operators/IsEmpty.cs

@@ -8,7 +8,7 @@ using System.Threading.Tasks;
 
 namespace System.Linq
 {
-    public static partial class AsyncEnumerable
+    public static partial class AsyncEnumerableEx
     {
         public static Task<bool> IsEmpty<TSource>(this IAsyncEnumerable<TSource> source)
         {