Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Workflow.Runtime/DebugEngine/IExpressionEvaluationFrame.cs

@@ -0,0 +1,25 @@
+#region Using directives
+
+using System;
+using System.Threading;
+using System.Reflection;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+using System.Globalization;
+using Microsoft.Win32;
+#endregion
+
+namespace System.Workflow.Runtime.DebugEngine
+{
+    #region Interface IExpressionEvaluationFrame
+
+    public delegate void DebugEngineCallback();
+
+    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
+    public interface IExpressionEvaluationFrame
+    {
+        void CreateEvaluationFrame(IInstanceTable instanceTable, DebugEngineCallback callback);
+    }
+
+    #endregion
+}