重写的时候调用基类的顺序


  protected override void Render(HtmlTextWriter writer)
        {
            if (Page != null)
            {
                Page.VerifyRenderingInServerForm(this);
            }
            base.Render(writer);
        }  protected override void Render(HtmlTextWriter writer)
        {   base.Render(writer);
            if (Page != null)
            {
                Page.VerifyRenderingInServerForm(this);
            }
           
        }
调用基类方法顺序不同，调用基类的顺序有什么规则吗，谢谢