Could not find type '<type name>'
Complete error message: 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.
This error occurred because a reference was not found.
Make sure the type indicated in the error message is referenced, and that any assemblies that the type requires are also referenced.
To correct this error
Commonly, the problem is that a control in the solution has not been built. To build, select Build Solution from the Build menu.
Otherwise, if the control has already been built, add a reference manually by right-clicking the References folder in Solution Explorer and choosing Add Reference.