partial void DeleteFlight_Detail(Flight_Detail instance);
 partial void UpdateFlight_Detail(Flight_Detail instance);
 private void detach_Flight_Details(Flight_Detail entity)
 {
     this.SendPropertyChanging();
     entity.Aircraft = null;
 }
 partial void InsertFlight_Detail(Flight_Detail instance);
 private void attach_Flight_Details(Flight_Detail entity)
 {
     this.SendPropertyChanging();
     entity.Route = this;
 }