工厂应该坚持实体吗?

工厂是否应该坚持他们建造的实体?还是来电者的工作?伪示例传入:

    public class OrderFactory
    {
      public Order Build()
      {
        var order = new Order();
        ....
        return order;
      }
    }

public class OrderController : Controller
{
    public OrderController(IRepository repository)
    {
       this.repository = repository;
    }

    public ActionResult MyAction()
    {
       var order = factory.Build();
       repository.Insert(order);
       ...
    }
}

或

public class OrderFactory
{
  public OrderFactory(IRepository repository)
  {
     this.repository = repository;
  }

  public Order Build()
  {
    var order = new Order();
    ...
    repository.Insert(order);
    return order;
   }
}

public class OrderController : Controller
{
  public ActionResult MyAction()
  {
     var order = factory.Build();
     ...
  }

}

这里有推荐的做法吗?