private void detach_Shipments(Shipment entity)
		{
			this.SendPropertyChanging();
			entity.Cart = null;
		}
		private void attach_Shipments(Shipment entity)
		{
			this.SendPropertyChanging();
			entity.Cart = this;
		}
 partial void UpdateShipment(Shipment instance);
 partial void DeleteShipment(Shipment instance);
 partial void InsertShipment(Shipment instance);