ASP.NET IP Adresi Kontrolu

public partial class chat : System.Web.UI.Page
{
    protected void getIP()
    {
        string IPadresi = string.Empty;
        if(HttpContext.Current.Request.ServerVariables["HTTP_X__FORWARDER_FOR"]!= null)
        {
            IPadresi = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDER_FOR"].ToString();
        }
        else if (HttpContext.Current.Request.UserHostAddress.Length != 0)
        {
            IPadresi = HttpContext.Current.Request.UserHostAddress;
        }
        Label1.Text = "IP niz:" + IPadresi;

    }
    protected void Page_Load(object sender, EventArgs e)
    {
        getIP();
    }
}