partial void DeleteRoomBilling(RoomBilling instance);
partial void UpdateRoomBilling(RoomBilling instance);
private void detach_RoomBillings(RoomBilling entity) { this.SendPropertyChanging(); entity.Room = null; }
partial void InsertRoomBilling(RoomBilling instance);
private void attach_RoomBillings(RoomBilling entity) { this.SendPropertyChanging(); entity.Room = this; }