string urlAddress = "http://google.com/";
 
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(urlAddress);
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
if (response.StatusCode == HttpStatusCode.OK)
{
  Stream receiveStream = response.GetResponseStream();
  StreamReader readStream = null;
  if (response.CharacterSet == null)
    readStream = new StreamReader(receiveStream);
  else
    readStream = new StreamReader(receiveStream, Encoding.GetEncoding(response.CharacterSet));
  string data = readStream.ReadToEnd();
  response.Close();
  readStream.Close();
}