private void detach_tOrders(tOrder entity)
 {
     this.SendPropertyChanging();
     entity.tMenu = null;
 }
 private void attach_tOrders(tOrder entity)
 {
     this.SendPropertyChanging();
     entity.tMenu = this;
 }
 partial void UpdatetOrder(tOrder instance);
 partial void DeletetOrder(tOrder instance);
 partial void InserttOrder(tOrder instance);