c#如何获得cpu,硬盘的物理序列号

  [StructLayout(LayoutKind.Sequential)]
   public struct NAME_BUFFER
  { 
   [MarshalAs(UnmanagedType.ByValArray, SizeConst=(int)NCBCONST.NCBNAMSZ)]
   public byte[] name;
   public byte name_num; 
   public byte name_flags; 
  }

  [StructLayout(LayoutKind.Sequential)]
   public struct NCB
  { 
   public byte  ncb_command; 
   public byte  ncb_retcode; 
   public byte  ncb_lsn; 
   public byte  ncb_num; 
   public IntPtr ncb_buffer; 
   public ushort ncb_length; 
   [MarshalAs(UnmanagedType.ByValArray, SizeConst=(int)NCBCONST.NCBNAMSZ)]
   public byte[]  ncb_callname; 
   [MarshalAs(UnmanagedType.ByValArray, SizeConst=(int)NCBCONST.NCBNAMSZ)]
   public byte[]  ncb_name; 
   public byte  ncb_rto; 
   public byte  ncb_sto; 
   public IntPtr ncb_post; 
   public byte  ncb_lana_num; 
   public byte  ncb_cmd_cplt; 
   [MarshalAs(UnmanagedType.ByValArray, SizeConst=10)]
   public byte[] ncb_reserve;
   public IntPtr ncb_event;
  }

  [StructLayout(LayoutKind.Sequential)]
   public struct LANA_ENUM
  { 
   public byte length; 
   [MarshalAs(UnmanagedType.ByValArray, SizeConst=(int)NCBCONST.MAX_LANA)]
   public byte[] lana;
  }

  [StructLayout(LayoutKind.Auto)]
   public struct ASTAT
  { 
   public ADAPTER_STATUS adapt;
   [MarshalAs(UnmanagedType.ByValArray, SizeConst=(int)NCBCONST.NUM_NAMEBUF)]
   public NAME_BUFFER[] NameBuff;
  }
  public class Win32API
  {
   [DllImport("NETAPI32.DLL")]
   public static extern char Netbios(ref NCB ncb);
  }
 
  public string GetMacAddress()
  {
   string addr="";
   try
   {
    int cb;
    ASTAT adapter;

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