關(guān)鍵代碼：       

        /// <summary>        /// 根據(jù)網(wǎng)卡類型來(lái)獲取mac地址        /// </summary>        /// <param name="networkType">網(wǎng)卡類型</param>        /// <param name="macAddressFormatHanlder">格式化獲取到的mac地址</param>        /// <returns>獲取到的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>        /// 根據(jù)網(wǎng)卡類型以及網(wǎng)卡狀態(tài)獲取mac地址        /// </summary>        /// <param name="networkType">網(wǎng)卡類型</param>        /// <param name="status">網(wǎng)卡狀態(tài)</param>        ///Up 網(wǎng)絡(luò)接口已運(yùn)行，可以傳輸數(shù)據(jù)包。         ///Down 網(wǎng)絡(luò)接口無(wú)法傳輸數(shù)據(jù)包。         ///Testing 網(wǎng)絡(luò)接口正在運(yùn)行測(cè)試。         ///Unknown 網(wǎng)絡(luò)接口的狀態(tài)未知。         ///Dormant 網(wǎng)絡(luò)接口不處于傳輸數(shù)據(jù)包的狀態(tài)；它正等待外部事件。         ///NotPResent 由于缺少組件（通常為硬件組件），網(wǎng)絡(luò)接口無(wú)法傳輸數(shù)據(jù)包。         ///LowerLayerDown 網(wǎng)絡(luò)接口無(wú)法傳輸數(shù)據(jù)包，因?yàn)樗\(yùn)行在一個(gè)或多個(gè)其他接口之上，而這些“低層”接口中至少有一個(gè)已關(guān)閉。         /// <param name="macAddressFormatHanlder">格式化獲取到的mac地址</param>        /// <returns>獲取到的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>        /// 獲取讀到的第一個(gè)mac地址        /// </summary>        /// <returns>獲取到的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;        }