Get User IP address in asp.net

We have Request.UserHostAddress to get the IP address in ASP.NET, but this is usually the user's ISP's IP address, not exactly the user's machine IP address who for example clicked a link


HttpContext.Current.Request.UserHostAddress; 
or
HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];

To get the IP address of the machine and not the proxy use the following code

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

 private string getUserIPAddress()
    {
        string strHostName = System.Net.Dns.GetHostName();
        string clientIPAddress = System.Net.Dns.GetHostAddresses(strHostName).GetValue(0).ToString();
        return clientIPAddress;


    }