C#通过WMI读取MAC地址

该方法依赖WMI的系统服务，该服务一般不会被关闭；但如果系统服务缺失或者出现问题，该方法无法取得MAC地址，需要重启Windows Management Instrumentation服务。

public static string GetMacAddress()
        {
            try
            {
                string active_mac = "";
                ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
                ManagementObjectCollection moc = mc.GetInstances();
                foreach (ManagementObject mo in moc)
                {
                    if ((bool)mo["IPEnabled"] == true)
                        active_mac = mo["MacAddress"].ToString();
                    mo.Dispose();
                }
                string mac = active_mac.Substring(0, 2) + active_mac.Substring(3, 2) + active_mac.Substring(6, 2) + active_mac.Substring(9, 2) + active_mac.Substring(12, 2) + active_mac.Substring(15, 2);
                return mac;
            }
            catch (Exception ex)
            {
                return "Error Mac." + ex.Message;
            }
        }