Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Activities/System/Activities/ActivityWithResult.cs

@@ -0,0 +1,64 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//-----------------------------------------------------------------------------
+
+namespace System.Activities
+{
+    using System.Runtime.Serialization;
+
+    public abstract class ActivityWithResult : Activity
+    {
+        internal ActivityWithResult()
+            : base()
+        {
+        }
+
+        public Type ResultType
+        {
+            get
+            {
+                return this.InternalResultType;
+            }
+        }
+
+        [IgnoreDataMember] // this member is repeated by all subclasses, which we control
+        public OutArgument Result
+        {
+            get
+            {
+                return this.ResultCore;
+            }
+            set
+            {
+                this.ResultCore = value;
+            }
+        }
+
+        internal abstract Type InternalResultType
+        {
+            get;
+        }
+
+        internal abstract OutArgument ResultCore
+        {
+            get;
+            set;
+        }
+
+        internal RuntimeArgument ResultRuntimeArgument
+        {
+            get;
+            set;
+        }
+
+        internal abstract object InternalExecuteInResolutionContextUntyped(CodeActivityContext resolutionContext);
+
+        internal override bool IsActivityWithResult
+        {
+            get
+            {
+                return true;
+            }
+        }
+    }
+}