C#得到CPU的序列号、硬盘序列号、网卡序列号

            }
            retrun _HDInfo;
}

//获取网卡硬件地址
 public static void 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;
 }