The root designer may return any type of object, but the object must be compatible with an adapter for the technology of the host. Hosting environments such as vsprvs provide a way to plug in new view technology adapters. The default view object for the Windows Forms designer is a System.Windows.Forms.Control instance.

Namespace: System.ComponentModel.Design
Assembly: System (in System.dll)
Assembly Versions: 2.0.0.0, 4.0.0.0