private void detach_Pizzas(Pizza entity)
		{
			this.SendPropertyChanging();
			entity.Category = null;
		}
		private void attach_Pizzas(Pizza entity)
		{
			this.SendPropertyChanging();
			entity.Category = this;
		}
 partial void UpdatePizza(Pizza instance);
 partial void DeletePizza(Pizza instance);
 partial void InsertPizza(Pizza instance);