c#中获取cpu序列号,硬盘id,网卡mac地址

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) 
   {