如何获取ASP.NET webrequest的HTML

我想得到的源代码

使用http模式发出请求并将html添加到某个div，如下所示：

ASPX页

string adres = "https://betorder.com/Sports.html";
    WebRequest gelenIstek = HttpWebRequest.Create(adres);
    WebResponse gelenCevap;
    using (gelenCevap = gelenIstek.GetResponse())
    {
        using (StreamReader donenDeger = new StreamReader(gelenCevap.GetResponseStream()))
        {
            string gelenBilgi = donenDeger.ReadToEnd();
            string gonder = gelenBilgi;
            div.InnerHtml = gonder;
        }
    }

<form id="form1" runat="server">
  <asp:Panel runat="server" ID="pnlHtml"></asp:Panel>
</form>

    protected override void OnLoad(EventArgs e)
    {
        base.OnLoad(e);
        var adres = "http://betorder.com/Sports.html";
        var gelenIstek = HttpWebRequest.Create(adres);
        WebResponse gelenCevap;
        using (gelenCevap = gelenIstek.GetResponse())
        {
            using (var donenDeger = new StreamReader(gelenCevap.GetResponseStream()))
            {
                var response = donenDeger.ReadToEnd();
                var divcontrol = new HtmlGenericControl
                {
                    TagName = "div", 
                    InnerHtml = response
                };
                pnlHtml.Controls.Add(divcontrol);
            }
        }
    }