partial void DeleteOrder_Detail(Order_Detail instance);
 partial void UpdateOrder_Detail(Order_Detail instance);
		private void detach_Order_Details(Order_Detail entity)
		{
			this.SendPropertyChanging();
			entity.Product = null;
		}
 partial void InsertOrder_Detail(Order_Detail instance);
		private void attach_Order_Details(Order_Detail entity)
		{
			this.SendPropertyChanging();
			entity.Order = this;
		}