Http Request to Weather Underground

gistfile1.txt

const string url = @"http://api.wunderground.com/api/72002fc4632c2927/conditions/q/27519.json";

async static void RetrieveData()
{
  try
  {
    string contents;
    string Url = String.Format(url);
    HttpClient client = new HttpClient();
    contents = await client.GetStringAsync(url);

    System.Diagnostics.Debug.WriteLine(contents);
  }
  catch (System.Exception ex)
  {
    System.Diagnostics.Debug.WriteLine(ex);
  }
}