OK, I'm sorry, I must always use VB code in the proyect and thought that C# and VB had the same classes.
Are There another examples of how to customize like:
-Toolbar Options label ("Add or Remove Buttons")
-ContextMenuStrip in the Toolwindows ("Floating, Dockable, etc...)
-ContextMenuStrip in the BarFor with the tool bars and the command ("Customize...")