Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Runtime.DurableInstancing/System/Runtime/Workflow45Namespace.cs

@@ -0,0 +1,73 @@
+//----------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//----------------------------------------------------------------
+
+namespace System.Runtime
+{
+    using System.Xml.Linq;
+
+    [Fx.Tag.XamlVisible(false)]
+    static class Workflow45Namespace
+    {
+        const string baseNamespace = "urn:schemas-microsoft-com:System.Activities/4.5/properties";
+        static readonly XNamespace workflow45Namespace = XNamespace.Get(baseNamespace);
+
+        static XName definitionIdentity;
+        static XName definitionIdentities;
+        static XName definitionIdentityFilter;
+        static XName workflowApplication;
+  
+
+        public static XName DefinitionIdentity
+        {
+            get
+            {
+                if (definitionIdentity == null)
+                {
+                    definitionIdentity = workflow45Namespace.GetName("DefinitionIdentity");
+                }
+
+                return definitionIdentity;
+            }
+        }
+
+        public static XName DefinitionIdentities
+        {
+            get
+            {
+                if (definitionIdentities == null)
+                {
+                    definitionIdentities = workflow45Namespace.GetName("DefinitionIdentities");
+                }
+
+                return definitionIdentities;
+            }
+        }
+
+        public static XName DefinitionIdentityFilter
+        {
+            get
+            {
+                if (definitionIdentityFilter == null)
+                {
+                    definitionIdentityFilter = workflow45Namespace.GetName("DefinitionIdentityFilter");
+                }
+
+                return definitionIdentityFilter;
+            }
+        }
+
+        public static XName WorkflowApplication
+        {
+            get
+            {
+                if (workflowApplication == null)
+                {
+                    workflowApplication = workflow45Namespace.GetName("WorkflowApplication");
+                }
+
+                return workflowApplication;
+            }
+        }
+    }
+}