1. 引用命名空间     using System.Runtime.InteropServices;     using System.Management;    2. 取机器名   public string GetHostName()  {      return System.Net.Dns.GetHostName();  }    3. 取CPU编号  public String GetCpuID()  {    try    {        ManagementClass mc = new ManagementClass("Win32_Processor");        ManagementObjectCollection moc = mc.GetInstances()        String strCpuID = string.Empty;        foreach (ManagementObject mo in moc)        {           strCpuID = mo.Properties["ProcessorId"].Value.ToString();           break;        }        return strCpuID;     }     catch(Exception er)     {         return "";     }  }      4. 取第一块硬盘编号  public String GetHardDiskID()  {      try      {          ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT * FROM Win32_PhysicalMedia");          String strHardDiskID = string.Empty;          foreach (ManagementObject mo in searcher.Get())          {              strHardDiskID = mo["SerialNumber"].ToString().Trim();              break;          }          return strHardDiskID;       }       catch(Exception er)       {          //handle exception          return "";       }  }      5. 以下是取得Mac地址      [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(Exception ex)              {                  //handle exception                                        }              return addr.Replace(' ', '0');          }