Load XML document by XPathDocument & XPathNodeIterator

String uri = "https://cumulus.services.live.com/" + Program.userName + "/LiveContacts/Contacts";
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri);
HttpWebResponse response = (HttpWebResponse)request.GetResponse();

 XPathDocument doc = new XPathDocument(response.GetResponseStream());               
 XPathNavigator nav = doc.CreateNavigator();


 XPathNodeIterator iter = nav.Select("//WindowsLiveID");
 while (iter.MoveNext())
 {
  XPathNavigator navCurrent = iter.Current;
  Console.WriteLine(navCurrent.ToString());
 }