private void detach_BookingDetails(BookingDetail entity)
 {
     this.SendPropertyChanging();
     entity.RoomsData = null;
 }
 partial void DeleteBookingDetail(BookingDetail instance);
 partial void InsertBookingDetail(BookingDetail instance);
 partial void UpdateBookingDetail(BookingDetail instance);
 private void attach_BookingDetails(BookingDetail entity)
 {
     this.SendPropertyChanging();
     entity.CustomerData = this;
 }