获取mac地址

/// <summary>
        /// 获取MAC地址
        /// </summary>
        /// <returns></returns>
        public static string GetMacAddress()
        {
            string mac = "";
            ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
            ManagementObjectCollection moc = mc.GetInstances();
            foreach (ManagementObject mo in moc)
            {
                if ((bool)mo["IPEnabled"] == true)
                {
                    mac = mo["MacAddress"].ToString();
                    break;
                }
            }
            return mac;
        }