Visual Studio Design View - form is blank

Question

I have a C# project with two forms. All compiles well. When I run the project, all forms are drawn as they are expected to.

A couple of days back, the DesignView of

Answer 1

Another possibility: The designer seems to try to design the first class in the .h file, no matter what's its name. I just had an empty forward ref class declaration before the actual form class, and it tried use that.