获取本机的mac地址

public static string GetMacAddress()
        {
            try
            {
                string strMac = string.Empty;
                ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
                ManagementObjectCollection moc = mc.GetInstances();
                foreach (ManagementObject mo in moc)
                {
                    if ((bool)mo["IPEnabled"] == true)
                    {
                        strMac = mo["MacAddress"].ToString();
                    }
                }
                moc = null;
                mc = null;
                return strMac;
            }
            catch
            {
                return "unknown";
            }
        }