Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Web.Extensions/HttpResponseInternalBase.cs

@@ -0,0 +1,15 @@
+//------------------------------------------------------------------------------
+// <copyright file="IHttpResponseInternal.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Web {
+    using System.IO;
+
+    internal abstract class HttpResponseInternalBase : HttpResponseBase {
+        public virtual TextWriter SwitchWriter(TextWriter writer) {
+            throw new NotImplementedException();
+        }
+    }
+}