Create a model and the parse the json object to that model using newtonsoft.json or System.Web.Script.Serialization.
for example:
Model
public class MyModel
{
public string user_id { get; set; }
public string name { get; set; }
public string given_name { get; set; }
public string email { get; set; }
}
and your response
WebResponse response = request.GetResponse();
Console.WriteLine(((HttpWebResponse)response).StatusDescription);
dataStream = response.GetResponseStream();
StreamReader reader = new StreamReader(dataStream);
string responseFromServer = reader.ReadToEnd();
JavaScriptSerializer j = new JavaScriptSerializer();
MyModel model= j.Deserialize<MyModel>(responseFromServer .Content);
Hope this helps..