HttpwebRequest在命中移动url时无一例外地崩溃

我正在点击一个url，示例如下：

http://mobile.example.com/ip/someProduct-fl-oz/productID

我的请求是：

    public static string getMobileHtml(string url)
    {
        string responseData = "";
        try
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Accept = "text/html, application/xhtml+xml, */*";
            request.KeepAlive = true;
            request.UserAgent = "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)";
            request.Timeout = 10000;
            request.Host = "mobile.example.com";
            request.Method = "GET";
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            if (response.StatusCode == HttpStatusCode.OK)
            {
                Stream responseStream = response.GetResponseStream();
                StreamReader myStreamReader = new StreamReader(responseStream);
                responseData = myStreamReader.ReadToEnd();
            }
            response.Close();
        }
        catch (Exception e)
        {
            responseData = "An error occurred: " + e.Message;
        }
        return responseData;
    }

代码在线崩溃：

 HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);

毫无例外，刚刚中断，Curl Lib、WebClient中也发生了同样的事情，但我将其更改为HttpWebRequest，假设它是一个修复程序。有什么建议吗？