获取网卡硬件地址代码

  //public static string GetMacAddress()        //{        //    string _MacAddress = "";        //    ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");        //    ManagementObjectCollection moc2 = mc.GetInstances();        //    foreach (ManagementObject mo in moc2)        //    {        //        if ((bool)mo["IPEnabled"] == true)        //            _MacAddress = mo["MacAddress"].ToString();        //        mo.Dispose();        //    }        //    return _MacAddress;        //}