private void detach_PackOrders(PackOrder entity)
		{
			this.SendPropertyChanging();
			entity.Return = null;
		}
		private void attach_PackOrders(PackOrder entity)
		{
			this.SendPropertyChanging();
			entity.Return = this;
		}
 partial void UpdatePackOrder(PackOrder instance);
 partial void DeletePackOrder(PackOrder instance);
 partial void InsertPackOrder(PackOrder instance);