/// <summary>
/// Gets the cpu 编号.
///需引用　using System.Management;
/// </summary>
/// <returns></returns>
public string GetCpuId()
{
   string cpuInfo = "";
   ManagementClass cimobject = new ManagementClass("Win32_Processor");
   ManagementObjectCollection moc = cimobject.GetInstances();
   foreach (ManagementObject mo in moc)
   {
     cpuInfo = mo.Properties["ProcessorId"].Value.ToString();
   }
   return cpuInfo;
}