Code to connect to API via HttpWebRequest API and get the JSON results returned into a dynamic object... JSON.net req.

loadData.cs

public void LoadData(Uri uri)
{
    HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(uri);
    request.BeginGetResponse(new AsyncCallback(ReadWebRequestCallback), request);
}

private void ReadWebRequestCallback(IAsyncResult callbackResult)
{
    try
    {
        HttpWebRequest request = (HttpWebRequest)callbackResult.AsyncState;
        HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(callbackResult);
        using (StreamReader reader = new StreamReader(response.GetResponseStream()))
        {

            string limitHeader = response.Headers["X-RateLimit-Remaining"];
            string results = reader.ReadToEnd();

            Deployment.Current.Dispatcher.BeginInvoke(() =>
            {
                //Read the JSON from the string.
                JsonTextReader jsonReader = new JsonTextReader(new StringReader(results));

                //Create instance of Json serializer.
                JsonSerializer se = new JsonSerializer();

                //Deserialize the text and place in dynamic type, for easy manipulation.
                dynamic parsedData = se.Deserialize(jsonReader);

                int i = 0;
                foreach (var item in parsedData)
                {
                    this.Items.Add(new ItemViewModel() 
                    { 
                        ID = i.ToString(),
                        limitHeader = limitHeader
                    });

                    i++;
                }
            });

        }
    }
    catch (Exception e)
    {
        Deployment.Current.Dispatcher.BeginInvoke(() =>
        {
            MessageBox.Show("Network error occured " + e.Message);
        });
    }
}