how to get country Name using IP Address in asp.net

 public string GetCountryByIP(string ipAddress)
    {
        string strReturnVal;
        //string ipResponse = IPRequestHelper("http://api.ipinfodb.com/v3/ip-country/?key=(api key deleted for security purposes)&ip=" + ipAddress);
        //string ipResponse = IPRequestHelper("http://iplocationtools.com/ip_location_api.php?ip={0}" + ipAddress);
        string ipResponse = IPRequestHelper(" http://ip-api.com/xml/?ip=" + ipAddress);
 

        //return ipResponse;
        XmlDocument ipInfoXML = new XmlDocument();
        ipInfoXML.LoadXml(ipResponse);
        XmlNodeList responseXML = ipInfoXML.GetElementsByTagName("query");

        NameValueCollection dataXML = new NameValueCollection();

        dataXML.Add(responseXML.Item(0).ChildNodes[2].InnerText, responseXML.Item(0).ChildNodes[2].Value);

        strReturnVal = responseXML.Item(0).ChildNodes[1].InnerText.ToString(); // Contry
        strReturnVal += "(" + responseXML.Item(0).ChildNodes[2].InnerText.ToString() + ")";  // Contry Code
        return strReturnVal;
    }

    public string IPRequestHelper(string url)
    {

        HttpWebRequest objRequest = (HttpWebRequest)WebRequest.Create(url);
        HttpWebResponse objResponse = (HttpWebResponse)objRequest.GetResponse();

        StreamReader responseStream = new StreamReader(objResponse.GetResponseStream());
        string responseRead = responseStream.ReadToEnd();

        responseStream.Close();
        responseStream.Dispose();

        return responseRead;
    }