A partner of mine asked this, Hello, I am using C# and DSL Tools for VS2005. I need to create Transactions to change some data but i want them to be hidden from the user, that means, to not show in the UNDO list in VS2005. store.UndoManager.UndoState = UndoState.Disabled; this solved the problem but is documented has obsolete and no alternative is given nor could i found any until now, any1 knows a non obsolete way to do this. Compliments, Frederico.