Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

external/aspnetwebstack/test/System.Net.Http.Formatting.Test.Unit/Mocks/MockDelegatingStream.cs

@@ -0,0 +1,15 @@
+// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
+
+using System.IO;
+using System.Net.Http.Internal;
+
+namespace System.Net.Http.Mocks
+{
+    internal class MockNonClosingDelegatingStream : NonClosingDelegatingStream
+    {
+        public MockNonClosingDelegatingStream(Stream innerStream)
+            : base(innerStream)
+        {
+        }
+    }
+}