[سؤال] ما المشكلة في الكوكيز باستخدام HttpWebReaust?

PHP كود :
//----------------------------------------------------------------------
            HttpWebRequest req = (HttpWebRequest)WebRequest.Create("http://gamezconnect.com/ar/account/");
            string Data = "act=login&accesskey=&si_user=a7mad-bas%40hotmail.com&si_pass=1236987412&si_stay=1&x=30&y=34";
            Encoding encoding = new UTF8Encoding();
            byte[] postData = encoding.GetBytes(Data);

            req = (HttpWebRequest)WebRequest.Create("http://gamezconnect.com/ar/account/");
            req.Host = "gamezconnect.com";
            req.UserAgent = "Mozilla/5.0 (iPhone; U; CPU like Mac OS X; en) AppleWebKit/420+ (KHTML, like Gecko) Version/3.0 Mobile/1C25 Safari/419.3";
            req.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
            req.Referer = "http://gamezconnect.com/ar/account";
            req.KeepAlive = true;
            
            req.ContentType = "application/x-www-form-urlencoded";
            req.Method = WebRequestMethods.Http.Post;
            req.Timeout = 3000;
            req.AllowAutoRedirect = true;
            req.ContentLength = postData.Length;
            req.CookieContainer = new CookieContainer();
            
            req.CookieContainer = logincookie;
            
            ////////
            Stream s = req.GetRequestStream();
            s.Write(postData, 0, postData.Length);
            s.Flush();

            using (HttpWebResponse res = (HttpWebResponse)req.GetResponse())
            {
                logincookie.Add(res.Cookies);
            }
            ////////

            HttpWebRequest onlineRequset = (HttpWebRequest)WebRequest.Create("http://gamezconnect.com/ar/account");
            onlineRequset.Method = "GET";
            onlineRequset.CookieContainer = logincookie; 
            HttpWebResponse onlineResponse = (HttpWebResponse)onlineRequset.GetResponse();
            webBrowser1.DocumentStream = onlineResponse.GetResponseStream();


            ///////
          

           HttpWebResponse res1 = (HttpWebResponse)req.GetResponse();
          StreamReader  sr1 = new StreamReader(res1.GetResponseStream());
          string  x1 = sr1.ReadToEnd();
            richTextBox2.Text=x1;
            webBrowser2.DocumentText = richTextBox2.Text;