How to get client machine's mac address?

See more:

C#

ASP.NET

Hi all,

I'm developing a ASP.Net website. For User Tracking we need to register the Mac Address of the Client Machines where the User logging in. I have tried two methods. but in both methods it is taking server mac address instead of client machine.

Please, anyone help me, to get mac address of the client machine. thanks in advance.

What I have tried:

First Method
-------------

public string GetMACAddress()
{
var macAddr =
(from nic in NetworkInterface.GetAllNetworkInterfaces()
where nic.OperationalStatus == OperationalStatus.Up
select nic.GetPhysicalAddress().ToString()).FirstOrDefault();
return macAddr;
}

Second Method
-------------
foreach (NetworkInterface nic in NetworkInterface.GetAllNetworkInterfaces())
{
if (nic.OperationalStatus == OperationalStatus.Up && (!nic.Description.Contains("Virtual") && !nic.Description.Contains("Pseudo")))
{
if (nic.GetPhysicalAddress().ToString() != "")
{
mac = nic.GetPhysicalAddress().ToString();
}
}
}