Авторизация с использованием Cookies

HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://site.ru/login/");
            request.Method = "POST";
            string data = "code=&phone=&email=&password=test123&nick=Test_Cookiesarp&server=6";
            byte[] byteData = Encoding.UTF8.GetBytes(data);
            request.ContentLength = byteData.Length;
            Stream stream = request.GetRequestStream();
            stream.Write(byteData, 0, byteData.Length);
            string response = new StreamReader(request.GetResponse().GetResponseStream()).ReadToEnd();

HttpWebResponse result = null;
            HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create("http://site.ru");
            req.Method = "POST";
            req.ContentType = "application/x-www-form-urlencoded";
            byte[] SomeBytes = null;
            string FormParams = "code=&phone=&email=&password=test123&nick=Test_Cookiesarp&server=6";
            SomeBytes = Encoding.UTF8.GetBytes(FormParams);
            req.ContentLength = SomeBytes.Length;
            Stream newStream = req.GetRequestStream();
            newStream.Write(SomeBytes, 0, SomeBytes.Length);
            newStream.Close();
            string[] cookieVal = null;
            if (result.Headers["Set-Cookie"] != null)
                cookieVal = result.Headers["Set-Cookie"].Split(new char[] { ',' });
 
            Stream ReceiveStream = result.GetResponseStream();
            Encoding encode = Encoding.GetEncoding("utf-8");
            StreamReader sr = new StreamReader(ReceiveStream, encode);
            string answer = sr.ReadToEnd();
            sr.Close();
            result.Close();
            CookieContainer cookie = new CookieContainer();
            foreach (string cook in cookieVal)
            {
                string[] cookie1 = cook.Split(new char[] { ';' });
                if (cookie1.Length < 2)
                    continue;
                cookie.Add(new Cookie(cookie1[0].Split(new char[] { '=' })[0], cookie1[0].Split(new char[] { '=' })[1],
            cookie1[1].Split(new char[] { '=' })[1], cookie1.Length > 2 ? cookie1[2].Split(new char[] { '=' })[1] : ""));
            }
            HttpWebRequest req1 = (HttpWebRequest)HttpWebRequest.Create(("http://site.ru"));
            req1.UserAgent = "Mozilla/4.0+(compatible;+MSIE+5.01;+Windows+NT+5.0)";
            //Вот оно - важное дополнение.
            req1.CookieContainer = cookie;
            req1.Method = "GET";
            HttpWebResponse result1 = (HttpWebResponse) req1.GetResponse();
            Stream ReceiveStream1 = result1.GetResponseStream();
            //StreamReader sr = new StreamReader( ReceiveStream1, encode );
            string html = sr.ReadToEnd();
            result1.Close();
            result = (HttpWebResponse)req.GetResponse();