关键代码：       

        /// <summary>        /// 根据网卡类型来获取mac地址        /// </summary>        /// <param name="networkType">网卡类型</param>        /// <param name="macAddressFormatHanlder">格式化获取到的mac地址</param>        /// <returns>获取到的mac地址</returns>        public static string GetMacAddress(NetworkInterfaceType networkType, Func<string, string> macAddressFormatHanlder)        {            string _mac = string.Empty;            NetworkInterface[] _networkInterfaces = NetworkInterface.GetAllNetworkInterfaces();            foreach (NetworkInterface adapter in _networkInterfaces)            {                if (adapter.NetworkInterfaceType == networkType)                {                    _mac = adapter.GetPhysicalAddress().ToString();                    if (!String.IsNullOrEmpty(_mac))                        break;                }            }            if (macAddressFormatHanlder != null)                _mac = macAddressFormatHanlder(_mac);            return _mac;        }        /// <summary>        /// 根据网卡类型以及网卡状态获取mac地址        /// </summary>        /// <param name="networkType">网卡类型</param>        /// <param name="status">网卡状态</param>        ///Up 网络接口已运行，可以传输数据包。         ///Down 网络接口无法传输数据包。         ///Testing 网络接口正在运行测试。         ///Unknown 网络接口的状态未知。         ///Dormant 网络接口不处于传输数据包的状态；它正等待外部事件。         ///NotPresent 由于缺少组件（通常为硬件组件），网络接口无法传输数据包。         ///LowerLayerDown 网络接口无法传输数据包，因为它运行在一个或多个其他接口之上，而这些“低层”接口中至少有一个已关闭。         /// <param name="macAddressFormatHanlder">格式化获取到的mac地址</param>        /// <returns>获取到的mac地址</returns>        public static string GetMacAddress(NetworkInterfaceType networkType, OperationalStatus status, Func<string, string> macAddressFormatHanlder)        {            string _mac = string.Empty;            NetworkInterface[] _networkInterfaces = NetworkInterface.GetAllNetworkInterfaces();            foreach (NetworkInterface adapter in _networkInterfaces)            {                if (adapter.NetworkInterfaceType == networkType)                {                    if (adapter.OperationalStatus != status) continue;                    _mac = adapter.GetPhysicalAddress().ToString();                    if (!String.IsNullOrEmpty(_mac)) break;                }            }            if (macAddressFormatHanlder != null)                _mac = macAddressFormatHanlder(_mac);            return _mac;        }        /// <summary>        /// 获取读到的第一个mac地址        /// </summary>        /// <returns>获取到的mac地址</returns>        public static string GetMacAddress(Func<string, string> macAddressFormatHanlder)        {            string _mac = string.Empty;            NetworkInterface[] _networkInterfaces = NetworkInterface.GetAllNetworkInterfaces();            foreach (NetworkInterface adapter in _networkInterfaces)            {                _mac = adapter.GetPhysicalAddress().ToString();                if (!string.IsNullOrEmpty(_mac))                    break;            }            if (macAddressFormatHanlder != null)                _mac = macAddressFormatHanlder(_mac);            return _mac;        }