I have this code in pageload for geting Client Ip during login

            if (!IsPostBack)
            {
                string hostName = Dns.GetHostName(); // Retrive the Name of HOST
                Console.WriteLine(hostName);
                string myIP = Dns.GetHostByName(hostName).AddressList[0].ToString();
                lbl_hostIp.Text = myIP;
            }

Note - This code is working, but display same IP Address for each Client, Please review and develope this code for me.