How to implement 'undo' operation in .net windows application?

Question

Assume that, a win form has certain input fields and user enters/re-enters some data.

How to retain data previously entered by \'undo\' operation?

Just I wan

Answer 1

You may also found the Reversi library useful, as several others seems to have. See [http://www.codeproject.com/KB/dotnet/reversibleundoredo.aspx][1] or [this][2]

[1]: http://www.codeproject.com/KB/dotnet/reversibleundoredo.aspx Make Your Application Reversible to Support Undo And Redo

[2]: http://www.codeproject.com/script/Articles/Article.aspx?aid=22502 Undo Redo