public override void Execute() {
   using (MainFormTypeSelectionDialog dialog = new MainFormTypeSelectionDialog()) {
     dialog.ShowDialog((IWin32Window)MainFormManager.MainForm);
   }
 }
 public override void Execute()
 {
     using (MainFormTypeSelectionDialog dialog = new MainFormTypeSelectionDialog()) {
         dialog.ShowDialog((IWin32Window)MainFormManager.MainForm);
     }
 }