Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Data/Microsoft/SqlServer/Server/SmiEventStream.cs

@@ -0,0 +1,31 @@
+//------------------------------------------------------------------------------
+// <copyright file="SmiEventStream.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+// <owner current="true" primary="true">[....]</owner>
+// <owner current="true" primary="false">[....]</owner>
+//------------------------------------------------------------------------------
+
+namespace Microsoft.SqlServer.Server {
+
+    using System;
+
+    internal abstract class SmiEventStream : IDisposable {
+
+        internal abstract bool HasEvents { get; }
+
+        internal abstract void Close( SmiEventSink sink );
+
+        public virtual void Dispose( ) {
+            // Obsoleting from SMI -- use Close instead.
+            //  Intended to be removed (along with inheriting IDisposable) prior to RTM.
+
+            // Implement body with throw because there are only a couple of ways to get to this code:
+            //  1) Client is calling this method even though the server negotiated for V3+ and dropped support for V2-.
+            //  2) Server didn't implement V2- on some interface and negotiated V2-.
+            System.Data.Common.ADP.InternalError( System.Data.Common.ADP.InternalErrorCode.UnimplementedSMIMethod );
+        }
+
+        internal abstract void ProcessEvent( SmiEventSink sink );
+    }
+}