public Orders()
{
this._Order_Details = new EntitySet<Order_Details>(new Action<Order_Details>(this.attach_Order_Details), new Action<Order_Details>(this.detach_Order_Details));
this._Customers = default(EntityRef<Customers>);
this._Employees = default(EntityRef<Employees>);
this._Shippers = default(EntityRef<Shippers>);
OnCreated();
}