When I open the form in the application, I am seeing an error for each user control in the project.
Warning 13 The variable 'usercontrol1' is either undeclared or was never assigned. C:\Projects\MyApp\src\MyApp\FormMain.Designer.cs 202 0
and a matching
Warning 6 Could not find type 'MyCompany.Controls.MyApp.usercontrol1'. Please make sure that the assembly that contains this type is referenced. If this type is a part of your development project, make sure that the project has been successfully built. 0 0
The form and the user controls are in the same project.
If I make a new form, and do a fresh compile I can see the MyApp Components group in the VS 2008 toolbox. And if I try to use one of the controls in the new form I get the following error:
Failed to load toolbox item 'usercontrol1'. It will be removed from the toolbox.
Doesn't seem to be any rhyme or reason to it, no method just madness.