"Object of type 'System.EventHandler' cannot be converted to type 'System.EventHandler`1"
Ok, that really, really a big issue in the .NET Framework.
You cannot use a generic event handler, with a name ending by “changing”, when it is used as a data binding object on a form.
Really disappointing that those guy rely on event names.
No Comments.
-f.
Ref: http://social.msdn.microsoft.com/Forums/en-US/winforms/thread/51cce2f7-04c8-4703-882f-6c72ee6a1f8b