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;
}