private void RenderControl(AbstractControl ctrl)
 {
     ctrl.Render();
     for (int i = 0; i < ctrl.Children.Count; i++)
     {
         if (ctrl.GetChild(i) is AbstractControl)
         {
             RenderControl((AbstractControl)ctrl.GetChild(i));
         }
     }
 }
 private void RenderControl(AbstractControl ctrl)
 {
     ctrl.Render();
     for (int i = 0; i < ctrl.Children.Count; i++)
     {
         if (ctrl.GetChild(i) is AbstractControl)
             RenderControl((AbstractControl)ctrl.GetChild(i));
     }
 }