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

                            mo.Dispose();

                            macAddress = resMac;
                            break;
                        }

                    }

                }