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View Thread: Tracking object state.
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    Dr Herbie said:

    I have used the command pattern before to give multi-level undo\redo.  Depending on your application, this might be overkill. Currently I don't use this becuase I mostly work with ADO.NET datasets which have the RejectChanges method for cancellation.


    EDIT:  just happened upon which appears to be a framework for the command pattern (I have not looked in depth yet).

    Cool. Thanks Dr!!