Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.ServiceModel/System/ServiceModel/Description/PolicyVersion.cs

@@ -0,0 +1,38 @@
+//------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//------------------------------------------------------------
+
+using System;
+using System.Globalization;
+
+namespace System.ServiceModel.Description
+{
+    public sealed class PolicyVersion
+    {
+        string policyNamespace;
+
+        static PolicyVersion policyVersion12;
+        static PolicyVersion policyVersion15;
+
+        static PolicyVersion()
+        {
+            policyVersion12 = new PolicyVersion(MetadataStrings.WSPolicy.NamespaceUri);
+            policyVersion15 = new PolicyVersion(MetadataStrings.WSPolicy.NamespaceUri15);
+        }
+
+        PolicyVersion(string policyNamespace)
+        {
+            this.policyNamespace = policyNamespace;
+        }
+
+        public static PolicyVersion Policy12 { get { return policyVersion12; } }
+        public static PolicyVersion Policy15 { get { return policyVersion15; } }
+        public static PolicyVersion Default { get { return policyVersion12; } }
+        public string Namespace { get { return policyNamespace; } }
+
+        public override string ToString()
+        {
+            return policyNamespace;
+        }
+    }
+}