gistfile1.txt

var request = WebRequest.Create("http://foo.com/users/123");
request.Method = "GET";
var response = (HttpWebResponse)webRequest.GetResponse();
var data = string.Empty;

using (var stream = response.GetResponseStream())
    data = new StreamReader(stream).ReadToEnd();

//However you want to deserialize
var user = Deserialize<User>(data);