namespace Beisen.Native

 {

     using Beisen.Pdf;

     using System;

     using System.Runtime.InteropServices;

     internal sealed class DeviceInfo

     {

         private static DeviceInfo _Instance;

         public static DeviceInfo Instance

         {

             get

             {

                 if (_Instance == null)

                 {

                     _Instance = new DeviceInfo();

                 }

                 return _Instance;

             }

         }

         public string Id

         {

             get

             {

                 uint volumeSerialNumber = ;

                 uint num = 0u;

                 uint num2 = ;

                 uint num3 = ;

                 uint num4 = ;

                 uint num5 = ;

                 string systemDirectory = Environment.SystemDirectory;

                 if ((systemDirectory != null) && (systemDirectory.Length > ))

                 {

                     uint num6;

                     FileSystemFeature fileSystemFeature;

                     Platform.GetVolumeInformation(string.Format("{0}:\\", systemDirectory[]), null, , out num, out num6, out fileSystemFeature, null, );

                 }

                 string g = RegistryWOW6432.GetRegKey32<string>(RegHive.HKEY_LOCAL_MACHINE, @"SOFTWARE\Microsoft\Cryptography", "MachineGuid");

                 if ((g == null) || (g.Trim() == ""))

                 {

                     g = RegistryWOW6432.GetRegKey64<string>(RegHive.HKEY_LOCAL_MACHINE, @"SOFTWARE\Microsoft\Cryptography", "MachineGuid");

                 }

                 if (g != null)

                 {

                     byte[] buffer = new Guid(g).ToByteArray();

                     if (buffer != null)

                     {

                         num2 = BitConverter.ToUInt32(buffer, );

                         num3 = BitConverter.ToUInt32(buffer, );

                         num4 = BitConverter.ToUInt32(buffer, );

                         num5 = BitConverter.ToUInt32(buffer, );

                     }

                 }

                 return $"{volumeSerialNumber}-{num2}-{num3}-{num4}-{num5}";

             }

         }

     }

 }