Jak mogę korzystaćoczekiwać z HttpWebRequest w Windows Phone 8?

Czy istnieje sposób na sprawienie, aby rzeczy IAsyncResult działały z oczekiwaniem?

private async Task<int> GetCurrentTemperature()
{
  GeoCoordinate location = GetLocation();

  string url = "http://free.worldweatheronline.com/feed/weather.ashx?q=";
  url += location.Latitude.ToString();
  url += ",";
  url += location.Longitude.ToString();
  url += "&format=json&num_of_days=1&key=MYKEY";

  HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(url);
  webRequest.Method = "POST";
  webRequest.BeginGetResponse(new AsyncCallback(OnGotWebRequest), webRequest);
}

private void OnGotWebRequest(IAsyncResult asyncResult)
{
  HttpWebRequest webRequest = (HttpWebRequest)asyncResult.AsyncState;
  var httpResponse = (HttpWebResponse)webRequest.EndGetResponse(asyncResult);
  using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
  {
    string responseText = streamReader.ReadToEnd();
  }
}

Dzięki!