Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.ServiceModel/System/ServiceModel/UnknownMessageReceivedEventArgs.cs

@@ -0,0 +1,24 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//-----------------------------------------------------------------------------
+
+namespace System.ServiceModel
+{
+    using System;
+    using System.ServiceModel.Channels;
+
+    public sealed class UnknownMessageReceivedEventArgs : EventArgs
+    {
+        Message message;
+
+        internal UnknownMessageReceivedEventArgs(Message message)
+        {
+            this.message = message;
+        }
+
+        public Message Message
+        {
+            get { return this.message; }
+        }
+    }
+}