check visitor country on website

string ipAddress = Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
            if (string.IsNullOrEmpty(ipAddress))
            {
                ipAddress = Request.ServerVariables["REMOTE_ADDR"];
                //ipAddress = "97.96.224.60";
            }
 
            string APIKey = "ur key";
            string url = string.Format("http://api.ipinfodb.com/v3/ip-city/?key={0}&ip={1}&format=json", APIKey, ipAddress);
            using (WebClient client = new WebClient())
            {
                string json = client.DownloadString(url);
                Location location = new JavaScriptSerializer().Deserialize<location>(json);
                List<location> locations = new List<location>();
                locations.Add(location);
  s = locations[0].CountryName;
}
 

public class Location
{
    public string CountryName{ get; set; }
}