//取CPU编号
    public String GetCpuID()
    {
        try
        {
             ManagementClass mc = new ManagementClass("Win32_Processor");
             ManagementObjectCollection moc = mc.GetInstances();

             String strCpuID = null;
            foreach (ManagementObject mo in moc)
            {
                 strCpuID = mo.Properties["ProcessorId"].Value.ToString();
                break;
             }
            return strCpuID;
         }
        catch
        {
            return "";
         }

     }//end method

//获取网卡mac地址
    public string GetMac()
    {
        try
        {
             ManagementObjectSearcher query = new ManagementObjectSearcher("SELECT * FROM Win32_NetworkAdapterConfiguration");
             ManagementObjectCollection queryCollection = query.Get();
            foreach (ManagementObject mo in queryCollection)
            {
                if (mo["IPEnabled"].ToString() == "True")
                    return mo["MacAddress"].ToString();
             }
            return "";
         }
        catch
        {
            return "";
         }