Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.ServiceModel/System/ServiceModel/OperationFormatUse.cs

@@ -0,0 +1,24 @@
+//------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//------------------------------------------------------------
+
+namespace System.ServiceModel
+{
+    public enum OperationFormatUse
+    {
+        Literal,
+        Encoded,
+    }
+
+    static class OperationFormatUseHelper
+    {
+        static public bool IsDefined(OperationFormatUse x)
+        {
+            return
+                x == OperationFormatUse.Literal ||
+                x == OperationFormatUse.Encoded ||
+                false;
+        }
+    }
+
+}