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;
}