C# WebRequest hanging with no timeout

Question

I have built a WebRequest in a WPF application into a background worker, but it is hanging if the website does not return a 404 error. There is a timeout, and found that some people have also had the same problem with the timeout not working and making the WebRequest hang. I tried to implement the code recommended for fixing the hang which is where I have the using() lines, but it still doesn't work.

// Try to login, if error, report

String method = "POST";
String postdata = "postdata=test";
String url = "http://localhost:90/randomurlthatdoesntwork";             

WebRequest rqst = HttpWebRequest.Create(url);
rqst.Method = method;
if (!String.IsNullOrEmpty(postdata))
{
     rqst.ContentType = "application/x-www-form-urlencoded";
     byte[] byteData = UTF8Encoding.UTF8.GetBytes(postdata);
     rqst.ContentLength = byteData.Length;
     rqst.Timeout = 10000;

     using (Stream postStream = rqst.GetRequestStream())
     {
          // I believe this is where the request hangs
          postStream.Write(byteData, 0, byteData.Length);
          postStream.Close();   
          rqst.GetResponse().Close();
          rqst.GetRequestStream().Close();
      }
}

((HttpWebRequest)rqst).KeepAlive = true;
loginProcess.ReportProgress(90);

using (var response1 = rqst.GetResponse())
{
     using (var responseStream1 = response1.GetResponseStream())
     {
          using (var reader1 = new StreamReader(responseStream1))
          {

               string strRsps = reader1.ReadToEnd();
               loginProcess.ReportProgress(95);
               loginVars = strRsps;
               reader1.Close();

      }

     args.Result = "SUCCESS";
     }
}

Answer 1

How do you know it is hung in HttpWebRequest? Can you get tracelog of your application? See creating a system.net log for your application.After you get the trace, put it on pastebin.com and we can take a look.