Calling Google Geo Coding Service with Json.Net Server Side

GoogleGeoCodingJson.cs

 public interface IGeoLocationService
    {
        Location GetLocation(string street, string city, string state, string zip);
        Location GetLocation(string address);
    }

    public class GoogleGeoLocationService : IGeoLocationService
    {
        public  Location GetLocation(string street, string city, string state, string zip)
        {
            var address = string.Format("{0},+{1},+{2}+{3}",
                                        Encode(street), Encode(city), Encode(state), Encode(zip));

            return GetLocation(address);
        }


        public  Location GetLocation(string address)
        {
            var url = string.Format("http://maps.googleapis.com/maps/api/geocode/json?address={0}&sensor=false",
                                    address);

            try
            {
                // prepare the web page we will be asking for
                var request = (HttpWebRequest) WebRequest.Create(url);
                request.Method = "GET";
                request.ContentType = "application/json; charset=utf-8";

                // execute the request
                string responseVal;
                using (var response = (HttpWebResponse) request.GetResponse())
                {
                    var resStream = response.GetResponseStream();
                    using (var reader = new StreamReader(resStream))
                    {
                        responseVal = reader.ReadToEnd();
                    }
                }

                var o = JObject.Parse(responseVal);
                var resultGeo = o.SelectToken("results[0].geometry");
                var lat = (decimal) resultGeo.SelectToken("location.lat");
                var lng = (decimal) resultGeo.SelectToken("location.lng");
                return new Location(lat, lng);
            }
            catch (Exception e)
            {
                ThrowInvalid(url, e);
            }


            return null;
        }


        private static void ThrowInvalid(string url, Exception ex)
        {
            throw new InvalidOperationException(string.Format("GeoCoder could not find lat long for {0}", url), ex);
        }

        private static string Encode(string input)
        {
            return HttpUtility.UrlEncode(input.Replace(" ", "+"));
        }
    }

    public class Location
    {
        public Location(decimal lat, decimal lng)
        {
            Lng = lng;
            Lat = lat;
        }

        public decimal Lat { get; private set; }
        public decimal Lng { get; private set; }
    }