public Order()
{
this._Order_Details = new EntitySet<Order_Detail>(new Action<Order_Detail>(this.attach_Order_Details), new Action<Order_Detail>(this.detach_Order_Details));
this._Customer = default(EntityRef<Customer>);
this._Employee = default(EntityRef<Employee>);
this._Shipper = default(EntityRef<Shipper>);
OnCreated();
}