通过下面的几种办法，为什么得到的全部服务器的硬件ID，有没有办法得到客户端的硬件ID，或你们是怎么用户认证的呢

 protected void Button1_Click(object sender, EventArgs e)        {            Label1.Text = GetCpuId() + "||" + GetDiskID()+ "||" +                          GetDiskVolumeSerialNumber() + "||" + getCpu2();        }             /// <summary>        /// 查询CPU编号        /// </summary>        public string GetCpuId()        {            ManagementClass mClass = new ManagementClass("Win32_Processor");            ManagementObjectCollection moc = mClass.GetInstances();            string cpuId = null;            foreach (ManagementObject mo in moc)            {                cpuId = mo.Properties["ProcessorId"].Value.ToString();                break;            }            return cpuId;        }        public string GetDiskID()        {            String HDid = null;            ManagementClass cimobject1 = new ManagementClass("Win32_DiskDrive");            ManagementObjectCollection moc1 = cimobject1.GetInstances();            foreach (ManagementObject mo in moc1)            {                HDid = mo.Properties["Model"].Value as string;            }            return HDid;        }        public string GetDiskVolumeSerialNumber()        {            ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");            ManagementObject disk = new ManagementObject("win32_logicaldisk.deviceid=\"c:\"");            disk.Get();            return disk.GetPropertyValue("VolumeSerialNumber").ToString();        }        public string getCpu2()        {            string strCpu = null;            ManagementClass myCpu = new ManagementClass("win32_Processor");            ManagementObjectCollection myCpuConnection = myCpu.GetInstances();            foreach (ManagementObject myObject in myCpuConnection)            {                strCpu = myObject.Properties["Processorid"].Value.ToString();                break;            } return strCpu;        }