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private string ExtractNodeValue(string text, string nodeName)
{
    string result = string.Empty;

    int slength = ("<" + nodeName + ">").Length;
    int sindex = text.IndexOf("<" + nodeName + ">");
    int eindex = text.IndexOf("</" + nodeName + ">");

    if (sindex > 0 && eindex > 0)
        result = text.Substring(sindex + slength, eindex - sindex - slength);

    return result;
}



string request = string.Format("http://maps.google.com/maps/geo?ll={0},{1}&hl=en&output=xml&key=abcdefg", location.latitude, location.longitude);
Logger.Log(request);
HttpWebRequest httprequest = (HttpWebRequest)WebRequest.Create(request);
WebResponse responce = httprequest.GetResponse();
Stream str = responce.GetResponseStream();
XmlTextReader reader = new XmlTextReader(str);
reader.XmlResolver = null;
XmlDocument doc = new XmlDocument();
doc.Load(reader);
str.Close();
reader.Close();

XmlNodeList listResponse = doc.ChildNodes[1].ChildNodes[0].ChildNodes;
foreach (XmlNode nodePlace in listResponse)
{
    if (nodePlace.Name == "Placemark")
    {
        string text = nodePlace.InnerXml;

        string Country = ExtractNodeValue(text, "CountryName");
        if ((this.DataContext.Countries.Count(x => x.Name == location.countryName) == 0 || string.IsNullOrWhiteSpace(location.countryName)) &&
            !string.IsNullOrWhiteSpace(Country))
        {
            location.countryName = Country;
        }

        string Region = ExtractNodeValue(text, "AdministrativeAreaName");
        if (this.DataContext.States.Count(x => x.AlphaCode == location.region || x.Name == location.region) == 0 &&
            !string.IsNullOrWhiteSpace(Region))
        {
            location.region = Region;
        }

        string City = ExtractNodeValue(text, "LocalityName");
        if (this.DataContext.Cities.Count(x => x.Name == location.city) == 0 &&
            !string.IsNullOrWhiteSpace(City))
        {
            location.city = City;
        }
        break;
    }
}