title: unable to get html source from url
body: <p>I have read most of the answers with my question. But I get nothing from this url. Well, actually I'm getting <code>"    "</code></p>
  
  <p>This is the url:</p>
  
  <p><a href="http://www.casadellibro.com/busqueda-generica?busqueda=9783126759120&amp;nivel=5&amp;auto=0&amp;maxresultados=-1" rel="nofollow">http://www.casadellibro.com/busqueda-generica?busqueda=9783126759120&amp;nivel=5&amp;auto=0&amp;maxresultados=-1</a></p>
  
  <p>My code:</p>
  
  <pre><code>System.Net.WebRequest req = System.Net.WebRequest.Create(url);
  System.Net.WebResponse resp = req.GetResponse();
  System.IO.StreamReader sr = new System.IO.StreamReader(resp.GetResponseStream());
  string response = sr.ReadToEnd();
  </code></pre>
  
  <p>Any idea?</p>
  
  <p>Thank you in advance.</p>