private void detach_Cars(Car entity)
		{
			this.SendPropertyChanging();
			entity.Brand = null;
		}
		private void attach_Cars(Car entity)
		{
			this.SendPropertyChanging();
			entity.Brand = this;
		}
 partial void UpdateCar(Car instance);
 partial void DeleteCar(Car instance);
 partial void InsertCar(Car instance);