c#如何获得硬盘的物理序列号

using System;
using System.Runtime.InteropServices;
using  System.Management;
namespace Hardware
{
 /// <summary>
 /// Hardware_Mac 的摘要说明。
 /// </summary>
 public class HardwareInfo
 {
  //取机器名
  public string GetHostName()
  {
   return System.Net.Dns.GetHostName();
  }

  //取CPU编号
  public String GetCpuID()
  {
   try
   {
    ManagementClass mc = new ManagementClass("Win32_Processor");
    ManagementObjectCollection moc = mc.GetInstances();
     
    String strCpuID = null ;
    foreach( ManagementObject mo in moc )
    {
     strCpuID = mo.Properties["ProcessorId"].Value.ToString();
     break;
    }
    return strCpuID;
   }
   catch
   {
    return "";
   }

  }//end method
 
  //取第一块硬盘编号
  public String GetHardDiskID()
  {
   try
   {
    ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT * FROM Win32_PhysicalMedia");
    String strHardDiskID = null ;
    foreach(ManagementObject mo in searcher.Get())
    {   
     strHardDiskID = mo["SerialNumber"].ToString().Trim();
     break;         
    }
    return strHardDiskID ;
   }
   catch
   {
    return "";
   }
  }//end

  public enum NCBCONST
  {
   NCBNAMSZ   =16,      /* absolute length of a net name         */
   MAX_LANA   =254,      /* lana's in range 0 to MAX_LANA inclusive   */
   NCBENUM      =0x37,      /* NCB ENUMERATE LANA NUMBERS            */
   NRC_GOODRET   =0x00,      /* good return                              */
   NCBRESET    =0x32,      /* NCB RESET                        */
   NCBASTAT    =0x33,      /* NCB ADAPTER STATUS                  */
   NUM_NAMEBUF =30,      /* Number of NAME's BUFFER               */
  }

  [StructLayout(LayoutKind.Sequential)]
   public struct ADAPTER_STATUS
  {
   [MarshalAs(UnmanagedType.ByValArray, SizeConst=6)]
   public byte[] adapter_address;
   public byte   rev_major; 
   public byte   reserved0; 
   public byte   adapter_type; 
   public byte   rev_minor; 
   public ushort    duration; 
   public ushort    frmr_recv; 
   public ushort    frmr_xmit; 
   public ushort    iframe_recv_err; 
   public ushort    xmit_aborts; 
   public uint   xmit_success; 
   public uint   recv_success; 
   public ushort    iframe_xmit_err; 
   public ushort    recv_buff_unavail; 
   public ushort    t1_timeouts; 
   public ushort    ti_timeouts; 
   public uint   reserved1; 
   public ushort    free_ncbs; 
   public ushort    max_cfg_ncbs; 
   public ushort    max_ncbs; 
   public ushort    xmit_buf_unavail; 
   public ushort    max_dgram_size; 
   public ushort    pending_sess; 
   public ushort    max_cfg_sess; 
   public ushort    max_sess; 
   public ushort    max_sess_pkt_size; 
   public ushort    name_count;
  }

  [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;
    NCB Ncb=new NCB();
    char uRetCode;
    LANA_ENUM lenum;

    Ncb.ncb_command = (byte)NCBCONST.NCBENUM;
    cb = Marshal.SizeOf(typeof(LANA_ENUM));
    Ncb.ncb_buffer = Marshal.AllocHGlobal(cb);
    Ncb.ncb_length = (ushort)cb;
    uRetCode = Win32API.Netbios(ref Ncb);
    lenum = (LANA_ENUM)Marshal.PtrToStructure(Ncb.ncb_buffer, typeof(LANA_ENUM));
    Marshal.FreeHGlobal(Ncb.ncb_buffer);
    if(uRetCode != (short)NCBCONST.NRC_GOODRET)
     return "";

    for(int i=0; i < lenum.length ;i++)
    {
     Ncb.ncb_command = (byte)NCBCONST.NCBRESET;
     Ncb.ncb_lana_num = lenum.lana[i];
     uRetCode = Win32API.Netbios(ref Ncb);
     if(uRetCode != (short)NCBCONST.NRC_GOODRET)
      return "";

     Ncb.ncb_command = (byte)NCBCONST.NCBASTAT;
     Ncb.ncb_lana_num = lenum.lana[i];
     Ncb.ncb_callname[0]=(byte)'*';
     cb = Marshal.SizeOf(typeof(ADAPTER_STATUS)) + Marshal.SizeOf(typeof(NAME_BUFFER))*(int)NCBCONST.NUM_NAMEBUF;
     Ncb.ncb_buffer = Marshal.AllocHGlobal(cb);
     Ncb.ncb_length = (ushort)cb;
     uRetCode = Win32API.Netbios(ref Ncb);
     adapter.adapt = (ADAPTER_STATUS)Marshal.PtrToStructure(Ncb.ncb_buffer, typeof(ADAPTER_STATUS));
     Marshal.FreeHGlobal(Ncb.ncb_buffer);

     if (uRetCode == (short)NCBCONST.NRC_GOODRET)
     {
      if(i>0)
       addr += ":";
      addr = string.Format("{0,2:X}{1,2:X}{2,2:X}{3,2:X}{4,2:X}{5,2:X}",
       adapter.adapt.adapter_address[0],
       adapter.adapt.adapter_address[1],
       adapter.adapt.adapter_address[2],
       adapter.adapt.adapter_address[3],
       adapter.adapt.adapter_address[4],
       adapter.adapt.adapter_address[5]);
     }
    }
   }
   catch
   {}
   return addr.Replace(' ', '0');
  }

 }
}