/// <summary>

        /// 获得当前机器的活动中Mac地址，若无联网则返回空""

        /// 需在项目引用中添加 System.Management

        /// </summary>

        /// <returns>mac地址，例如：00-00-00-00-00-00</returns>

        public static string GetNetworkAdpaterID()

        {

            try

            {

                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;

                    }

                moc = null;

                mc = null;

                return mac.Trim().Replace(':', '-');

            }

            catch (Exception e)

            {

                return "error:" + e.Message;

            }

        }