C#

  if (HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != null)
            {
                //To get the IP address of the machine and not the proxy
                m_IPAddress = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString();
            }
            else if (HttpContext.Current.Request.UserHostAddress.Length != 0)
            {
                m_IPAddress = HttpContext.Current.Request.UserHostAddress;
            }
            DataTable dt = GetLocation(m_IPAddress);
            if (dt != null)
            {
                if (dt.Rows.Count > 0)
                {
                     m_IPCountry = dt.Rows[0]["City"].ToString() + "," + dt.Rows[0]["RegionName"].ToString() + "," + dt.Rows[0]["CountryName"].ToString() + "," + dt.Rows[0]["CountryCode"].ToString();
                }
                else
                {
                }
            } 
private DataTable GetLocation(string ipaddress)
        {

            //Create a WebRequest 

            WebRequest rssReq = WebRequest.Create("http://freegeoip.appspot.com/xml/" + ipaddress);
            //Create a Proxy 
            WebProxy px = new WebProxy("http://freegeoip.appspot.com/xml/" + ipaddress, true);
            //Assign the proxy to the WebRequest 
            rssReq.Proxy = px;
            //Set the timeout in Seconds for the WebRequest 
            rssReq.Timeout = 2000;
            try
            {
                //Get the WebResponse 
                WebResponse rep = rssReq.GetResponse();
                //Read the Response in a XMLTextReader 
                XmlTextReader xtr = new XmlTextReader(rep.GetResponseStream());
                //Create a new DataSet 
                DataSet ds = new DataSet();
                //Read the Response into the DataSet 
                ds.ReadXml(xtr);
                return ds.Tables[0];
            }

            catch
            {
                return null;
            }
        }