Client IP address

How can I retrieved current user ip address in asp.net c# from my local LAN in my web page?

in my case I want for example : I have web page when I open it in any PC in my Local LAN I want to get this PC IP and PC user name to send them to  SQl Database

This code get only the Sever IP:

public string GetLocalIP()
    {
        string _IP = null;
        System.Net.IPHostEntry _IPHostEntry =        System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName());
        foreach (System.Net.IPAddress _IPAddress in _IPHostEntry.AddressList)
        {
            
            if (_IPAddress.AddressFamily.ToString() == "InterNetwork")
            {
                _IP = _IPAddress.ToString();
            }
        }
        return _IP;
    } 

thank U all