Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.ServiceModel/System/ServiceModel/IClientChannel.cs

@@ -0,0 +1,27 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//-----------------------------------------------------------------------------
+
+namespace System.ServiceModel
+{
+    using System;
+    using System.ServiceModel.Channels;
+    using System.Collections.Generic;
+    using System.IdentityModel.Claims;
+    using System.IdentityModel.Policy;
+    using System.Net.Security;
+    using System.ServiceModel.Security.Tokens;
+
+    public interface IClientChannel : IContextChannel, IDisposable
+    {
+        bool AllowInitializationUI { get; set; }
+        bool DidInteractiveInitialization { get; }
+        Uri Via { get; }
+
+        event EventHandler<UnknownMessageReceivedEventArgs> UnknownMessageReceived;
+
+        void DisplayInitializationUI();
+        IAsyncResult BeginDisplayInitializationUI(AsyncCallback callback, object state);
+        void EndDisplayInitializationUI(IAsyncResult result);
+    }
+}