获取cpu和硬盘的序列号，得到机器码

using System.Management;
using System.Management.Instrumentation;

///   <summary>
///   获取cpu序列号
///   </summary>
///   <returns> string </returns>
public string GetCpuInfo()
{
string cpuInfo = " ";
using (ManagementClass cimobject = new ManagementClass("Win32_Processor"))
{
ManagementObjectCollection moc = cimobject.GetInstances();

foreach (ManagementObject mo in moc)
{
cpuInfo = mo.Properties["ProcessorId"].Value.ToString();
mo.Dispose();
}
}
return cpuInfo.ToString();
}

///   <summary>
///   获取硬盘ID
///   </summary>
///   <returns> string </returns>
public string GetHDid()
{
string HDid = " ";
using (ManagementClass cimobject1 = new ManagementClass("Win32_DiskDrive"))
{
ManagementObjectCollection moc1 = cimobject1.GetInstances();
foreach (ManagementObject mo in moc1)
{
HDid = (string)mo.Properties["Model"].Value;
mo.Dispose();
}
}
return HDid.ToString();
}