Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.ServiceModel/System/ServiceModel/TransactionFlowOption.cs

@@ -0,0 +1,28 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//-----------------------------------------------------------------------------
+namespace System.ServiceModel
+{
+    public enum TransactionFlowOption
+    {
+        NotAllowed,
+        Allowed,
+        Mandatory,
+    }
+
+    static class TransactionFlowOptionHelper
+    {
+        public static bool IsDefined(TransactionFlowOption option)
+        {
+            return (option == TransactionFlowOption.NotAllowed ||
+                    option == TransactionFlowOption.Allowed ||
+                    option == TransactionFlowOption.Mandatory);
+            //option == TransactionFlowOption.Ignore);
+        }
+        internal static bool AllowedOrRequired(TransactionFlowOption option)
+        {
+            return (option == TransactionFlowOption.Allowed ||
+                    option == TransactionFlowOption.Mandatory);
+        }
+    }
+}