The invoked member is not supported in a dynamic assembly.

You might encounter another issue with the forms designer in Visual Studio 2005. When you have located a user control on the form, and the user control is in a different project, and the user control uses GetExportedTypes() to determine visible types, then you might receive the following error message when trying to view the form:

The invoked member is not supported in a dynamic assembly.

The error message is typically accompanied with a stack dump including information about the line of code which causes the problem. In order to solve the issue you need to find a different way of coding. In my case I had to use GetTypes() instead of GetExportedTypes(). After that change the form designer worked again as expected.