how to do undo function

[beeleegie]

I want my application can have undo function, just like photoshop that can undo more than one steps. Do anyone know c# provide this kind of library for us to handle it?

 

[alexboly]

I think that you have to manage the undo by yourself, because your application knows what changed in its data.
It depends on the things you want undone. If it's about a database, you can always use transactions. If not, you have to make your own mechanism.