public static string getUniqueID(){
    try{
        ManagementObjectSearcher mbs = new ManagementObjectSearcher("Select * From Win32_processor");
        ManagementObjectCollection mbsList = mbs.Get();
        string id = "";
        foreach(ManagementObject mo in mbsList)
        {
            id = mo["ProcessorID"
 
].ToString();
        }
        ManagementObjectSearcher mos = new ManagementObjectSearcher("Select * From Win32_BaseBoard");
        ManagementObjectCollection moc= mbs.Get();
        string motherBoard = "";
        foreach(ManagementObject mo in moc)
        {
            motherBoard = (string)mo["SerialNumber"
 
];
        }       
        return id + motherBoard
    }catch(Exception ex){
        return "這裡是預設的id"
    }
}