I have a C# application (Visual Studio 2003). There is a mainmenu control on the form. Every time I change the menu and Build or Rebuild, all the controls on the form disappear, 105 errors are returned, and the form reverts to the startup view of a small blank form. (Hard to describe). The changes are saved, however, and no code is lost. I just tested a new project and the menu control itself would not appear to be the problem. Suggestions, please?