Internet.GetMacAddress Method

public string GetMacAddress()
 {
     string macaddr = "";
     IPGlobalProperties computerProperties = IPGlobalProperties.GetIPGlobalProperties();
     NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
     if (nics == null || nics.Length < 1)
         return "0";
     foreach (NetworkInterface adapter in nics)
     {
         IPInterfaceProperties properties = adapter.GetIPProperties();
         if (adapter.NetworkInterfaceType == NetworkInterfaceType.Wireless80211 || adapter.NetworkInterfaceType == NetworkInterfaceType.Ethernet)
         {
             PhysicalAddress address = adapter.GetPhysicalAddress();
             byte[] bytes = address.GetAddressBytes();
             for (int i = 0; i < bytes.Length; i++)
             {
                 macaddr += bytes[i].ToString("X2");
                 if (i != bytes.Length - 1)
                     macaddr += "-";
             }
         }
         break;
     }
     return macaddr;
 }