public void UnloadClass(System.IntPtr pAppDomain, System.IntPtr c)
 {
     Call(delegate
     {
         callbackSwitch.UnloadClass(
             MTA2STA.MarshalIntPtrTo <ICorDebugAppDomain>(pAppDomain),
             MTA2STA.MarshalIntPtrTo <ICorDebugClass>(c)
             );
     });
 }