//取得机器的CPU型号、硬盘ID、网卡MAC。
using System.Management;
using System.Management.Instrumentation;

private void GetInfo() 
{ 
    string cpuInfo = "";//cpu序列号 
    ManagementClass cimobject = new ManagementClass("Win32_Processor"); 
    ManagementObjectCollection moc = cimobject.GetInstances(); 
    foreach(ManagementObject mo in moc) 
    { 
     cpuInfo = mo.Properties["ProcessorId"].Value.ToString(); 
     Response.Write ("cpu序列号："+cpuInfo.ToString ()); 
}

    //获取硬盘ID 
    String HDid; 
    ManagementClass cimobject1 = new ManagementClass("Win32_DiskDrive"); 
    ManagementObjectCollection moc1 = cimobject1.GetInstances(); 
    foreach(ManagementObject mo in moc1) 
    { 
     HDid = (string)mo.Properties["Model"].Value; 
     Response.Write ("硬盘序列号："+HDid.ToString ()); 
    } 

    //获取网卡硬件地址 
    ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration"); 
    ManagementObjectCollection moc2 = mc.GetInstances(); 
    foreach(ManagementObject mo in moc2) 
    { 
     if((bool)mo["IPEnabled"] == true) 
      Response.Write("MAC addresst{0}"+mo["MacAddress"].ToString()); 
     mo.Dispose(); 
    } 
}