Insert UserIP C sharp

public string getExternalIp()

        {

            try

            {

                string ipAddress;

                ipAddress = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];

                if (ipAddress == "" || ipAddress == null)

                {

                    ipAddress = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];

                }

                return ipAddress;

               

            }

            catch { return null; }

        }

public string getExternalIp()

        {

            try

            {

               

string externalIP;

externalIP = (new System.Net.WebClient()).DownloadString("http://checkip.dyndns.org/");

externalIP = (new System.Text.RegularExpressions.Regex( @"\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}") ).Matches(externalIP)[0].ToString();

                return externalIP;

            }

            catch { return null; }

        }

string IPAddress =  getExternalIp() ?? HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"].ToString();