Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.ServiceModel.Internals/System/Runtime/AsyncCompletionResult.cs

@@ -0,0 +1,19 @@
+// <copyright>
+//   Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+
+namespace System.Runtime
+{
+    enum AsyncCompletionResult
+    {
+        /// <summary>
+        /// Inidicates that the operation has been queued for completion.
+        /// </summary>
+        Queued,
+
+        /// <summary>
+        /// Indicates the operation has completed.
+        /// </summary>
+        Completed,
+    }
+}