How to get Client IP Address using C#

    protected string GetIP()
        {

            string localIP = null;
            IPHostEntry localEntry = Dns.GetHostEntry(Dns.GetHostName());
            foreach (IPAddress Ip in localEntry.AddressList)
            {
                if (Ip.AddressFamily.ToString() == "InterNetwork")
                   localIP = Ip.ToString();
               
            }

            return localIP;

        }

protected void Page_Load(object sender, EventArgs e)
        {
            Label1.Text = GetIP();
         }