how to get mac address of client that browse web site by asp.net mvc c#

Question

I'm trying to get mac address from the client's machine that browse my web site, I've been used this:

using System.Management;
class Sample_ManagementClass
{
    public static int Main(string[] args)
    {
        ManagementClass objMC = new
        ManagementClass("Win32_NetworkAdapterConfiguration");
        ManagementObjectCollection objMOC = objMC.GetInstances();

        foreach (ManagementObject objMO in objMOC)
        {
            if (!(bool)objMO["ipEnabled"])
                continue;

            Console.WriteLine((string)objMO["MACAddress"]);
        }
    }
 }

But it is not recognized Management Namespace, so what should I do?

Answer 1

it's unfortunately not possible to reliably get the mac address of the client machine due to firewalls, proxies and ISP generic addresses being given. However, you can make a stab at getting the ip address by using:

var remoteIpAddress = Request.UserHostAddress;

However, this may or may not actually represent the client machine and is more likely the ISP gateway or some other ip address. It's a well known problem and one that even google have found hard to crack using clientside javascript (the idea here being that you get the actual local ip address via a js library and pass that over to your server function).

[edit] - might be worth taking a look at the following for inspiration/confirmation of the issue:

http://www.dotnetfunda.com/forums/thread2088-how-to-get-mac-address-of-client-machine.aspx