Index: src/Common/DelftTools.Shell.Core/Project.cs
===================================================================
diff -u -r11918aed7833985ed88f93a4238b2d8f241cff17 -r8edbe5e2130c81b456385607891c6ef98928f88e
--- src/Common/DelftTools.Shell.Core/Project.cs	(.../Project.cs)	(revision 11918aed7833985ed88f93a4238b2d8f241cff17)
+++ src/Common/DelftTools.Shell.Core/Project.cs	(.../Project.cs)	(revision 8edbe5e2130c81b456385607891c6ef98928f88e)
@@ -1,18 +1,20 @@
 using System.Collections.Generic;
 using DelftTools.Utils.Collections.Generic;
+using DelftTools.Utils.Data;
 
 namespace DelftTools.Shell.Core
 {
     /// <summary>
     /// Container of all data and tasks.
     /// </summary>
-    public class Project : IObservable
+    public class Project : EditableObjectUnique<long>, IObservable
     {
         private string name;
         private string description;
 
         private bool isChanged;
         private bool isTemporary;
+        private bool isMigrated;
 
         /// <summary>
         /// Creates instance of the Project.