HttpWebResponse/HttpWebRequest upload image

[TAREQ F ABUZUHRI]

i have prolem with uloadinge image to server i try to upload image and send data (POST) method a the same time i use this code

            HttpWebResponse response;
            Stream resStream;
            StreamReader objSR;
            CookieContainer cookieContainer = new CookieContainer();
            ASCIIEncoding encoding = new ASCIIEncoding();
            HttpWebRequest request;
            string sResponse;
            string postData;
            byte\[\]  data;
            string UrlLogin;

            //Upload Image Page \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*
            //\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*

            UrlLogin = "http://localhost:63637/whois/test0.aspx";
            string uploadfile = "C:\\\\fax\\\\pics\\\\7130570.jpg";
            string fileFormName = "userfile";
            string contenttype = "image/pjpeg";

            postData = "?wm\_flag=" + "0";
            postData += ("&action=" + "process");
            postData += ("&hi=" + "ft");
            request = (HttpWebRequest)WebRequest.Create(UrlLogin + postData);
            //request.Accept = "\*/\*";
            request.KeepAlive = true;
            request.CookieContainer = cookieContainer;
            string boundary = "----------" + DateTime.Now.Ticks.ToString("x");
            request.ContentType = "multipart/form-data; boundary=" + boundary;
            request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)";
            request.Method = "POST";
            request.AllowAutoRedirect = true;

            data = encoding.GetBytes(postData);

            StringBuilder sb = new StringBuilder();
            sb.Append("--"); sb.Append(boundary); sb.Append("\\r\\n"); sb.Append("Content-Disposition: form-data; name=\\""); sb.Append(fileFormName); sb.Append("\\"; filename=\\"");
            sb.Append(Path.GetFileName(uploadfile)); sb.Append("\\""); sb.Append("\\r\\n"); sb.Append("Content-Type: "); sb.Append(contenttype); sb.Append("\\r\\n"); sb.Append("\\r\\n");
            string postHeader = sb.ToString();
            byte\[\] postHeaderBytes = Encoding.UTF8.GetBytes(postHeader);

            // Build the trailing boundary string as a byte array
            // ensuring the boundary appears on a line by itself
            byte\[\] boundaryBytes = Encoding