Developing MIS

Apr 30 2013 3:14 PM

showing error
CS1061: 'ASP.teacher_master' does not contain a definition for 'NavigationMenu_MenuItemClick' and no extension method 'NavigationMenu_MenuItemClick' accepting a first argument of type 'ASP.teacher_master' could be found (are you missing a using directive or an assembly reference?)

have also uploaded my code