C# 获取当前活动网络连接mac地址

                 IPAddress localIp = null;
                 IPAddress[] ipArray;
                 ipArray = Dns.GetHostAddresses(Dns.GetHostName());
                 localIp = ipArray.First(ip => ip.AddressFamily == AddressFamily.InterNetwork);
                 string resMac = "";
                 string resIP = "";
                 ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
                 ManagementObjectCollection moc2 = mc.GetInstances();
                 foreach (ManagementObject mo in moc2)
                 {
                     if ((bool)mo["IPEnabled"] == true && mo["IPAddress"] != null)

                     {
                         if (((string[])mo["IPAddress"])[] == localIp.ToString())
                         {
                             resMac = mo["MacAddress"].ToString();
                             resIP = mo["IPAddress"].ToString();

                             mo.Dispose();

                             macAddress = resMac;
                             break;
                         }

                     }

                 }