get HTML source C#

private string HtmlSrc(string url)
        {
            try
            {
                HttpWebRequest myWebRequest = (HttpWebRequest)WebRequest.Create(url);
                myWebRequest.Timeout = 5000; // Set time out
                myWebRequest.ReadWriteTimeout = 6000; // Set Read Write time out
                myWebRequest.UserAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1);Accept-Language:vi";
                WebResponse myWebResponse = myWebRequest.GetResponse();
                Stream ReceiveStream = myWebResponse.GetResponseStream();
                Encoding encode = System.Text.Encoding.GetEncoding("utf-8");
                StreamReader readStream = new StreamReader(ReceiveStream, encode);
                string strResponse = readStream.ReadToEnd();

                readStream.Close();
                myWebResponse.Close();

                return strResponse;
            }
            catch
            {
                return "Cannot connect";
            }
        }