protected override void OnControlRemoved(ControlEventArgs e)
{
base.OnControlRemoved(e);
IDrawDesignControl ddc = e.Control as IDrawDesignControl;
if (ddc != null)
{
DrawGroupBox dgb = this.Item as DrawGroupBox;
if (dgb != null)
{
dgb.OnRemoveItem(ddc);
}
}
}
