求助返回值的问题-读取Ntfs的代码NtfsUsnJournal

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using using PInvoke;
using using System.Runtime.InteropServices;
using Microsoft.Win32.SafeHandles;

namespace UsnJournal
{
    public class NtfsUsnJournal : IDisposable
    {
        #region enum(s)
        public enum UsnJournalReturnCode
        {
            INVALID_HANDLE_VALUE = -1,
            USN_JOURNAL_SUCCESS = 0,
            ERROR_INVALID_FUNCTION = 1,
            ERROR_FILE_NOT_FOUND = 2,
            ERROR_PATH_NOT_FOUND = 3,
            ERROR_TOO_MANY_OPEN_FILES = 4,
            ERROR_ACCESS_DENIED = 5,
            ERROR_INVALID_HANDLE = 6,
            ERROR_INVALID_DATA = 13,
            ERROR_HANDLE_EOF = 38,
            ERROR_NOT_SUPPORTED = 50,
            ERROR_INVALID_PARAMETER = 87,
            ERROR_JOURNAL_DELETE_IN_PROGRESS = 1178,
            USN_JOURNAL_NOT_ACTIVE = 1179,
            ERROR_JOURNAL_ENTRY_DELETED = 1181,
            ERROR_INVALID_USER_BUFFER = 1784,
            USN_JOURNAL_INVALID = 17001,
            VOLUME_NOT_NTFS = 17003,
            INVALID_FILE_REFERENCE_NUMBER = 17004,
            USN_JOURNAL_ERROR = 17005
        }

        public enum UsnReasonCode
        {
            USN_REASON_DATA_OVERWRITE = 0x00000001,
            USN_REASON_DATA_EXTEND = 0x00000002,
            USN_REASON_DATA_TRUNCATION = 0x00000004,
            USN_REASON_NAMED_DATA_OVERWRITE = 0x00000010,
            USN_REASON_NAMED_DATA_EXTEND = 0x00000020,
            USN_REASON_NAMED_DATA_TRUNCATION = 0x00000040,
            USN_REASON_FILE_CREATE = 0x00000100,
            USN_REASON_FILE_DELETE = 0x00000200,
            USN_REASON_EA_CHANGE = 0x00000400,
            USN_REASON_SECURITY_CHANGE = 0x00000800,
            USN_REASON_RENAME_OLD_NAME = 0x00001000,
            USN_REASON_RENAME_NEW_NAME = 0x00002000,
            USN_REASON_INDEXABLE_CHANGE = 0x00004000,
            USN_REASON_BASIC_INFO_CHANGE = 0x00008000,
            USN_REASON_HARD_LINK_CHANGE = 0x00010000,
            USN_REASON_COMPRESSION_CHANGE = 0x00020000,
            USN_REASON_ENCRYPTION_CHANGE = 0x00040000,
            USN_REASON_OBJECT_ID_CHANGE = 0x00080000,
            USN_REASON_REPARSE_POINT_CHANGE = 0x00100000,
            USN_REASON_STREAM_CHANGE = 0x00200000,
            USN_REASON_CLOSE = -1
        }

        #endregion

        #region private member variables

        private DriveInfo _driveInfo = null;
        private uint _volumeSerialNumber;
        private IntPtr _usnJournalRootHandle;

        private bool bNtfsVolume;

        #endregion

        #region properties

        private static TimeSpan _elapsedTime;
        public static TimeSpan ElapsedTime
        {
            get { return _elapsedTime; }
        }

        public string VolumeName
        {
            get { return _driveInfo.Name; }
        }

        public long AvailableFreeSpace
        {
            get { return _driveInfo.AvailableFreeSpace; }
        }

        public long TotalFreeSpace
        {
            get { return _driveInfo.TotalFreeSpace; }
        }

        public string Format
        {
            get { return _driveInfo.DriveFormat; }
        }

        public DirectoryInfo RootDirectory
        {
            get { return _driveInfo.RootDirectory; }
        }

        public long TotalSize
        {
            get { return _driveInfo.TotalSize; }
        }

        public string VolumeLabel
        {
            get { return _driveInfo.VolumeLabel; }
        }

        public uint VolumeSerialNumber
        {
            get { return _volumeSerialNumber; }
        }

        #endregion

        #region constructor(s)


        public NtfsUsnJournal(DriveInfo driveInfo)
        {
            DateTime start = DateTime.Now;
            _driveInfo = driveInfo;

            if (0 == string.Compare(_driveInfo.DriveFormat, "ntfs", true))
            {
                bNtfsVolume = true;

                IntPtr rootHandle = IntPtr.Zero;
                UsnJournalReturnCode usnRtnCode = GetRootHandle(out rootHandle);

                if (usnRtnCode == UsnJournalReturnCode.USN_JOURNAL_SUCCESS)
                {
                    _usnJournalRootHandle = rootHandle;
                    usnRtnCode = GetVolumeSerialNumber(_driveInfo, out _volumeSerialNumber);
                    if (usnRtnCode != UsnJournalReturnCode.USN_JOURNAL_SUCCESS)
                    {
                        _elapsedTime = DateTime.Now - start;
                        throw new Win32Exception((int)usnRtnCode);
                    }
                }
                else
                {
                    _elapsedTime = DateTime.Now - start;
                    throw new Win32Exception((int)usnRtnCode);
                }
            }
            else
            {
                _elapsedTime = DateTime.Now - start;
                throw new Exception(string.Format("{0} is not an 'NTFS' volume.", _driveInfo.Name));
            }
            _elapsedTime = DateTime.Now - start;
        }

        #endregion

        #region public methods

        public UsnJournalReturnCode
            CreateUsnJournal(ulong maxSize, ulong allocationDelta)
        {
            UsnJournalReturnCode usnRtnCode = UsnJournalReturnCode.VOLUME_NOT_NTFS;
            DateTime startTime = DateTime.Now;

            if (bNtfsVolume)
            {
                if (_usnJournalRootHandle.ToInt32() != Win32Api.INVALID_HANDLE_VALUE)
                {
                    usnRtnCode = UsnJournalReturnCode.USN_JOURNAL_SUCCESS;
                    UInt32 cb;

                    Win32Api.CREATE_USN_JOURNAL_DATA cujd = new Win32Api.CREATE_USN_JOURNAL_DATA();
                    cujd.MaximumSize = maxSize;
                    cujd.AllocationDelta = allocationDelta;

                    int sizeCujd = Marshal.SizeOf(cujd);
                    IntPtr cujdBuffer = Marshal.AllocHGlobal(sizeCujd);
                    Win32Api.ZeroMemory(cujdBuffer, sizeCujd);
                    Marshal.StructureToPtr(cujd, cujdBuffer, true);

                    bool fOk = Win32Api.DeviceIoControl(
                        _usnJournalRootHandle,
                        Win32Api.FSCTL_CREATE_USN_JOURNAL,
                        cujdBuffer,
                        sizeCujd,
                        IntPtr.Zero,
                        0,
                        out cb,
                        IntPtr.Zero);
                    if (!fOk)
                    {
                        usnRtnCode = ConvertWin32ErrorToUsnError((Win32Api.GetLastErrorEnum)Marshal.GetLastWin32Error());
                    }
                    Marshal.FreeHGlobal(cujdBuffer);
                }
                else
                {
                    usnRtnCode = UsnJournalReturnCode.INVALID_HANDLE_VALUE;
                }
            }

            _elapsedTime = DateTime.Now - startTime;
            return usnRtnCode;
        }      
        public UsnJournalReturnCode
            DeleteUsnJournal(Win32Api.USN_JOURNAL_DATA journalState)
        {
            UsnJournalReturnCode usnRtnCode = UsnJournalReturnCode.VOLUME_NOT_NTFS;
            DateTime startTime = DateTime.Now;

            if (bNtfsVolume)
            {
                if (_usnJournalRootHandle.ToInt32() != Win32Api.INVALID_HANDLE_VALUE)
                {
                    usnRtnCode = UsnJournalReturnCode.USN_JOURNAL_SUCCESS;
                    UInt32 cb;

                    Win32Api.DELETE_USN_JOURNAL_DATA dujd = new Win32Api.DELETE_USN_JOURNAL_DATA();
                    dujd.UsnJournalID = journalState.UsnJournalID;
                    dujd.DeleteFlags = (UInt32)Win32Api.UsnJournalDeleteFlags.USN_DELETE_FLAG_DELETE;

                    int sizeDujd = Marshal.SizeOf(dujd);
                    IntPtr dujdBuffer = Marshal.AllocHGlobal(sizeDujd);
                    Win32Api.ZeroMemory(dujdBuffer, sizeDujd);
                    Marshal.StructureToPtr(dujd, dujdBuffer, true);

                    bool fOk = Win32Api.DeviceIoControl(
                        _usnJournalRootHandle,
                        Win32Api.FSCTL_DELETE_USN_JOURNAL,
                        dujdBuffer,
                        sizeDujd,
                        IntPtr.Zero,
                        0,
                        out cb,
                        IntPtr.Zero);

                    if (!fOk)
                    {
                        usnRtnCode = ConvertWin32ErrorToUsnError((Win32Api.GetLastErrorEnum)Marshal.GetLastWin32Error());
                    }
                    Marshal.FreeHGlobal(dujdBuffer);
                }
                else
                {
                    usnRtnCode = UsnJournalReturnCode.INVALID_HANDLE_VALUE;
                }
            }
            _elapsedTime = DateTime.Now - startTime;
            return usnRtnCode;
        }      
        public UsnJournalReturnCode
            GetNtfsVolumeFolders(out List<Win32Api.UsnEntry> folders)
        {
            DateTime startTime = DateTime.Now;
            folders = new List<Win32Api.UsnEntry>();
            UsnJournalReturnCode usnRtnCode = UsnJournalReturnCode.VOLUME_NOT_NTFS;
            Int32 FoldersCount = 0;
            if (bNtfsVolume)
            {               
                if (_usnJournalRootHandle.ToInt32() != Win32Api.INVALID_HANDLE_VALUE)
                {
                    usnRtnCode = UsnJournalReturnCode.USN_JOURNAL_SUCCESS;

                    Win32Api.USN_JOURNAL_DATA usnState = new Win32Api.USN_JOURNAL_DATA();
                    usnRtnCode = QueryUsnJournal(ref usnState);

                    if (usnRtnCode == UsnJournalReturnCode.USN_JOURNAL_SUCCESS)
                    {
                        Win32Api.MFT_ENUM_DATA med;
                        med.StartFileReferenceNumber = 0;
                        med.LowUsn = 0;
                        med.HighUsn = usnState.NextUsn;
                        Int32 sizeMftEnumData = Marshal.SizeOf(med);
                        IntPtr medBuffer = Marshal.AllocHGlobal(sizeMftEnumData);
                        Win32Api.ZeroMemory(medBuffer, sizeMftEnumData);
                        Marshal.StructureToPtr(med, medBuffer, true);
                        int pDataSize = sizeof(UInt64) + 10000;
                        IntPtr pData = Marshal.AllocHGlobal(pDataSize);
                        Win32Api.ZeroMemory(pData, pDataSize);
                        uint outBytesReturned = 0;
                        Win32Api.UsnEntry usnEntry = null;
                        while (false != Win32Api.DeviceIoControl(
                            _usnJournalRootHandle,
                            Win32Api.FSCTL_ENUM_USN_DATA,
                            medBuffer,
                            sizeMftEnumData,
                            pData,
                            pDataSize,
                            out outBytesReturned,
                            IntPtr.Zero))
                        {
                            IntPtr pUsnRecord = new IntPtr(pData.ToInt32() + sizeof(Int64));
                            while (outBytesReturned > 60)
                            {
                                usnEntry = new Win32Api.UsnEntry(pUsnRecord);
                                if (usnEntry.IsFolder)
                                {
                                    folders.Add(usnEntry);
                                    FoldersCount += 1;
                                }
                                pUsnRecord = new IntPtr(pUsnRecord.ToInt32() + usnEntry.RecordLength);
                                outBytesReturned -= usnEntry.RecordLength;
                            }
                            Marshal.WriteInt64(medBuffer, Marshal.ReadInt64(pData, 0));
                        }

                        Marshal.FreeHGlobal(pData);
                        usnRtnCode = ConvertWin32ErrorToUsnError((Win32Api.GetLastErrorEnum)Marshal.GetLastWin32Error());
                        if (usnRtnCode == UsnJournalReturnCode.ERROR_HANDLE_EOF)
                        {
                            usnRtnCode = UsnJournalReturnCode.USN_JOURNAL_SUCCESS;
                        }
                    }
                }
                else
                {
                    usnRtnCode = UsnJournalReturnCode.INVALID_HANDLE_VALUE;
                }
            }
            folders.Sort();
            System.Windows.MessageBox.Show(Convert.ToString(FoldersCount));
            //return FoldersCount;   //我想返回FoldersCount的值
            return usnRtnCode;
        }

        public UsnJournalReturnCode
            GetFilesMatchingFilter(string filter, out List<Win32Api.UsnEntry> files)
        {
            Int32 FilesCount = 0;
            DateTime startTime = DateTime.Now;
            filter = filter.ToLower();
            files = new List<Win32Api.UsnEntry>();
            string[] fileTypes = filter.Split(' ', ',', ';');
            UsnJournalReturnCode usnRtnCode = UsnJournalReturnCode.VOLUME_NOT_NTFS;

            if (bNtfsVolume)
            {
                if (_usnJournalRootHandle.ToInt32() != Win32Api.INVALID_HANDLE_VALUE)
                {
                    usnRtnCode = UsnJournalReturnCode.USN_JOURNAL_SUCCESS;

                    Win32Api.USN_JOURNAL_DATA usnState = new Win32Api.USN_JOURNAL_DATA();
                    usnRtnCode = QueryUsnJournal(ref usnState);

                    if (usnRtnCode == UsnJournalReturnCode.USN_JOURNAL_SUCCESS)
                    {

                        Win32Api.MFT_ENUM_DATA med;
                        med.StartFileReferenceNumber = 0;
                        med.LowUsn = 0;
                        med.HighUsn = usnState.NextUsn;
                        Int32 sizeMftEnumData = Marshal.SizeOf(med);
                        IntPtr medBuffer = Marshal.AllocHGlobal(sizeMftEnumData);
                        Win32Api.ZeroMemory(medBuffer, sizeMftEnumData);
                        Marshal.StructureToPtr(med, medBuffer, true);

                        int pDataSize = sizeof(UInt64) + 10000;
                        IntPtr pData = Marshal.AllocHGlobal(pDataSize);
                        Win32Api.ZeroMemory(pData, pDataSize);
                        uint outBytesReturned = 0;
                        Win32Api.UsnEntry usnEntry = null;
                        while (false != Win32Api.DeviceIoControl(
                            _usnJournalRootHandle,
                            Win32Api.FSCTL_ENUM_USN_DATA,
                            medBuffer,
                            sizeMftEnumData,
                            pData,
                            pDataSize,
                            out outBytesReturned,
                            IntPtr.Zero))
                        {
                            IntPtr pUsnRecord = new IntPtr(pData.ToInt32() + sizeof(Int64));
                            while (outBytesReturned > 60)
                            {
                                usnEntry = new Win32Api.UsnEntry(pUsnRecord);
                                if (usnEntry.IsFile)
                                {
                                    string extension = Path.GetExtension(usnEntry.Name).ToLower();
                                    if (0 == string.Compare(filter, "*"))
                                    {
                                        files.Add(usnEntry);
                                    }
                                    else if (!string.IsNullOrEmpty(extension))
                                    {
                                        foreach (string fileType in fileTypes)
                                        {
                                            if (extension.Contains(fileType))
                                            {
                                                files.Add(usnEntry);
                                                FilesCount += 1;
                                            }
                                        }
                                    }
                                }
                                pUsnRecord = new IntPtr(pUsnRecord.ToInt32() + usnEntry.RecordLength);
                                outBytesReturned -= usnEntry.RecordLength;
                            }
                            Marshal.WriteInt64(medBuffer, Marshal.ReadInt64(pData, 0));
                        }

                        Marshal.FreeHGlobal(pData);
                        usnRtnCode = ConvertWin32ErrorToUsnError((Win32Api.GetLastErrorEnum)Marshal.GetLastWin32Error());
                        if (usnRtnCode == UsnJournalReturnCode.ERROR_HANDLE_EOF)
                        {
                            usnRtnCode = UsnJournalReturnCode.USN_JOURNAL_SUCCESS;
                        }
                    }
                }
                else
                {
                    usnRtnCode = UsnJournalReturnCode.INVALID_HANDLE_VALUE;
                }
            }
            files.Sort();
            System.Windows.MessageBox.Show(Convert.ToString(FilesCount));
            return usnRtnCode;
        }

        
        public bool
            IsUsnJournalActive()
        {
            DateTime start = DateTime.Now;
            bool bRtnCode = false;

            if (bNtfsVolume)
            {
                if (_usnJournalRootHandle.ToInt32() != Win32Api.INVALID_HANDLE_VALUE)
                {
                    Win32Api.USN_JOURNAL_DATA usnJournalCurrentState = new Win32Api.USN_JOURNAL_DATA();
                    UsnJournalReturnCode usnError = QueryUsnJournal(ref usnJournalCurrentState);
                    if (usnError == UsnJournalReturnCode.USN_JOURNAL_SUCCESS)
                    {
                        bRtnCode = true;
                    }
                }
            }
            _elapsedTime = DateTime.Now - start;
            return bRtnCode;
        }


        
        #endregion

        #region private member functions
        /// <summary>
        /// Converts a Win32 Error to a UsnJournalReturnCode
        /// </summary>
        /// <param name="Win32LastError">The 'last' Win32 error.</param>
        /// <returns>
        /// INVALID_HANDLE_VALUE                error generated by Win32 Api calls.
        /// USN_JOURNAL_SUCCESS                 usn journal function succeeded.
        /// ERROR_INVALID_FUNCTION              error generated by Win32 Api calls.
        /// ERROR_FILE_NOT_FOUND                error generated by Win32 Api calls.
        /// ERROR_PATH_NOT_FOUND                error generated by Win32 Api calls.
        /// ERROR_TOO_MANY_OPEN_FILES           error generated by Win32 Api calls.
        /// ERROR_ACCESS_DENIED                 accessing the usn journal requires admin rights.
        /// ERROR_INVALID_HANDLE                error generated by Win32 Api calls.
        /// ERROR_INVALID_DATA                  error generated by Win32 Api calls.
        /// ERROR_HANDLE_EOF                    error generated by Win32 Api calls.
        /// ERROR_NOT_SUPPORTED                 error generated by Win32 Api calls.
        /// ERROR_INVALID_PARAMETER             error generated by Win32 Api calls.
        /// ERROR_JOURNAL_DELETE_IN_PROGRESS    usn journal delete is in progress.
        /// ERROR_JOURNAL_ENTRY_DELETED         usn journal entry lost, no longer available.
        /// ERROR_INVALID_USER_BUFFER           error generated by Win32 Api calls.
        /// USN_JOURNAL_INVALID                 usn journal is invalid, id's don't match or required entries lost.
        /// USN_JOURNAL_NOT_ACTIVE              usn journal is not active on volume.
        /// VOLUME_NOT_NTFS                     volume is not an NTFS volume.
        /// INVALID_FILE_REFERENCE_NUMBER       bad file reference number - see remarks.
        /// USN_JOURNAL_ERROR                   unspecified usn journal error.
        /// </returns>
        private UsnJournalReturnCode
            ConvertWin32ErrorToUsnError(Win32Api.GetLastErrorEnum Win32LastError)
        {
            UsnJournalReturnCode usnRtnCode;

            switch (Win32LastError)
            {
                case Win32Api.GetLastErrorEnum.ERROR_JOURNAL_NOT_ACTIVE:
                    usnRtnCode = UsnJournalReturnCode.USN_JOURNAL_NOT_ACTIVE;
                    break;
                case Win32Api.GetLastErrorEnum.ERROR_SUCCESS:
                    usnRtnCode = UsnJournalReturnCode.USN_JOURNAL_SUCCESS;
                    break;
                case Win32Api.GetLastErrorEnum.ERROR_HANDLE_EOF:
                    usnRtnCode = UsnJournalReturnCode.ERROR_HANDLE_EOF;
                    break;
                default:
                    usnRtnCode = UsnJournalReturnCode.USN_JOURNAL_ERROR;
                    break;
            }

            return usnRtnCode;
        }

        /// <summary>
        /// Gets a Volume Serial Number for the volume represented by driveInfo.
        /// </summary>
        /// <param name="driveInfo">DriveInfo object representing the volume in question.</param>
        /// <param name="volumeSerialNumber">out parameter to hold the volume serial number.</param>
        /// <returns></returns>
        private UsnJournalReturnCode
            GetVolumeSerialNumber(DriveInfo driveInfo, out uint volumeSerialNumber)
        {
            Console.WriteLine("GetVolumeSerialNumber() function entered for drive '{0}'", driveInfo.Name);

            volumeSerialNumber = 0;
            UsnJournalReturnCode usnRtnCode = UsnJournalReturnCode.USN_JOURNAL_SUCCESS;
            string pathRoot = string.Concat("\\\\.\\", driveInfo.Name);

            IntPtr hRoot = Win32Api.CreateFile(pathRoot,
                0,
                Win32Api.FILE_SHARE_READ | Win32Api.FILE_SHARE_WRITE,
                IntPtr.Zero,
                Win32Api.OPEN_EXISTING,
                Win32Api.FILE_FLAG_BACKUP_SEMANTICS,
                IntPtr.Zero);

            if (hRoot.ToInt32() != Win32Api.INVALID_HANDLE_VALUE)
            {
                Win32Api.BY_HANDLE_FILE_INFORMATION fi = new Win32Api.BY_HANDLE_FILE_INFORMATION();
                bool bRtn = Win32Api.GetFileInformationByHandle(hRoot, out fi);

                if (bRtn)
                {
                    UInt64 fileIndexHigh = (UInt64)fi.FileIndexHigh;
                    UInt64 indexRoot = (fileIndexHigh << 32) | fi.FileIndexLow;
                    volumeSerialNumber = fi.VolumeSerialNumber;
                }
                else
                {
                    usnRtnCode = (UsnJournalReturnCode)Marshal.GetLastWin32Error();
                }

                Win32Api.CloseHandle(hRoot);
            }
            else
            {
                usnRtnCode = (UsnJournalReturnCode)Marshal.GetLastWin32Error();
            }

            return usnRtnCode;
        }

        private UsnJournalReturnCode
            GetRootHandle(out IntPtr rootHandle)
        {
            //
            // private functions don't need to check for an NTFS volume or
            // a valid _usnJournalRootHandle handle
            //
            UsnJournalReturnCode usnRtnCode = UsnJournalReturnCode.USN_JOURNAL_SUCCESS;
            rootHandle = IntPtr.Zero;
            string vol = string.Concat("\\\\.\\", _driveInfo.Name.TrimEnd('\\'));

            rootHandle = Win32Api.CreateFile(vol,
                 Win32Api.GENERIC_READ | Win32Api.GENERIC_WRITE,
                 Win32Api.FILE_SHARE_READ | Win32Api.FILE_SHARE_WRITE,
                 IntPtr.Zero,
                 Win32Api.OPEN_EXISTING,
                 0,
                 IntPtr.Zero);

            if (rootHandle.ToInt32() == Win32Api.INVALID_HANDLE_VALUE)
            {
                usnRtnCode = (UsnJournalReturnCode)Marshal.GetLastWin32Error();
            }

            return usnRtnCode;
        }

        /// <summary>
        /// This function queries the usn journal on the volume.
        /// </summary>
        /// <param name="usnJournalState">the USN_JOURNAL_DATA object that is associated with this volume</param>
        /// <returns></returns>
        private UsnJournalReturnCode
            QueryUsnJournal(ref Win32Api.USN_JOURNAL_DATA usnJournalState)
        {
            //
            // private functions don't need to check for an NTFS volume or
            // a valid _usnJournalRootHandle handle
            //
            UsnJournalReturnCode usnReturnCode = UsnJournalReturnCode.USN_JOURNAL_SUCCESS;
            int sizeUsnJournalState = Marshal.SizeOf(usnJournalState);
            UInt32 cb;

            bool fOk = Win32Api.DeviceIoControl(
                _usnJournalRootHandle,
                Win32Api.FSCTL_QUERY_USN_JOURNAL,
                IntPtr.Zero,
                0,
                out usnJournalState,
                sizeUsnJournalState,
                out cb,
                IntPtr.Zero);

            if (!fOk)
            {
                int lastWin32Error = Marshal.GetLastWin32Error();
                usnReturnCode = ConvertWin32ErrorToUsnError((Win32Api.GetLastErrorEnum)Marshal.GetLastWin32Error());
            }

            return usnReturnCode;
        }

        #endregion

        #region IDisposable Members

        public void Dispose()
        {
            Win32Api.CloseHandle(_usnJournalRootHandle);
        }

        #endregion
    }
}