Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.ServiceModel.Activities/System/ServiceModel/Activities/Constants.cs

@@ -0,0 +1,31 @@
+//----------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//----------------------------------------------------------------
+
+namespace System.ServiceModel.Activities
+{
+    using System;
+    using System.Activities;
+    using System.ServiceModel.Channels;
+
+    static class Constants
+    {
+        public const string CorrelatesWith = "CorrelatesWith";
+        public const string EndpointAddress = "EndpointAddress";
+        public const string Message = "Message";
+        public const string Parameter = "Parameter";
+        public const string RequestMessage = "RequestMessage";
+        public const string Result = "Result";
+        public const string TransactionHandle = "TransactionHandle";
+        public const string NoPersistHandle = "noPersistHandle";
+
+        public static readonly Type MessageType = typeof(Message);
+        public static readonly Type CorrelationHandleType = typeof(CorrelationHandle);
+        public static readonly Type UriType = typeof(Uri);
+        public static readonly Type NoPersistHandleType = typeof(NoPersistHandle);
+
+        public static readonly object[] EmptyArray = new object[0];
+        public static readonly string[] EmptyStringArray = new string[0];
+        public static readonly Type[] EmptyTypeArray = new Type[0];
+    }
+}