This email was created by [your name] who thought you would be interested in the following Article:
"Multilevel Undo and Redo Implementation in C# - Part I (Using Single Object Representing Change Approach)"
How single object Representing Change Approach and Stack can be used to implement Undo/Redo operation in C#
CodeProject also contains hundreds of articles, free source code samples and applications to help in your day to day programming. Why not give it a try!