how to get MAC address using C#

How to get the MAC address of  system using Asp.net/C#

Now I want to share with you some simple but important for our rapid development.
Here I want to discuss how to get system MAC address using c# ,

First way:
You need to import the System.Net namespace for this to work.
This will support IPv4 and IPv6.

NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
foreach (NetworkInterface adapter in nics)
    {
        IPInterfaceProperties properties = adapter.GetIPProperties();
        adapter.GetPhysicalAddress().ToString();
    }

Second way:

public string GetMACAddress()
{
  ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
  ManagementObjectCollection moc = mc.GetInstances();
  string MACAddress = String.Empty;
 foreach (ManagementObject mo in moc)
 {
     if (MACAddress == String.Empty) // only return MAC Address from first card   
           {
              if ((bool)mo["IPEnabled"] == true) MACAddress = mo["MacAddress"].ToString();
           }
      mo.Dispose();
 }

  MACAddress = MACAddress.Replace(":", "");
 return MACAddress;
}

You might want to also add  "mo["Caption"].ToString()" to test before the mac address so that you know which devices you are looking at.
Also, don't forget to use try/catch blocks on these as a NullPointerReference will kill the app.



How to get Client MAC address(Web):

To get the client MAC address only way we can rely on JavaScript and Active X control of Microsoft.It is only work in IE if Active X enable for IE. As the ActiveXObject is not available with the Firefox, its not working with the firefox and is working fine in IE.


This script is for IE only:

<script language="javascript">
     function showMacAddress(){

    var obj = new ActiveXObject("WbemScripting.SWbemLocator");
    var s = obj.ConnectServer(".");
    var properties = s.ExecQuery("SELECT * FROM Win32_NetworkAdapterConfiguration");
    var e = new Enumerator (properties);


    var output;
    output='<table border="0" cellPadding="5px" cellSpacing="1px" bgColor="#CCCCCC">';
    output=output + '<tr bgColor="#EAEAEA"><td>Caption</td><td>MACAddress</td></tr>';
    while(!e.atEnd())

    {
        e.moveNext();
        var p = e.item ();
        if(!p) continue;
        output=output + '<tr bgColor="#FFFFFF">';
        output=output + '<td>' + p.Caption; + '</td>';
        output=output + '<td>' + p.MACAddress + '</td>';
        output=output + '</tr>';
    }

    output=output + '</table>';
    document.getElementById("box").innerHTML=output;
}
</script>

Hope that it may help you.Please inform me if any one get any wrong with me.
Thanks