/// <summary>
        /// Set the data from the raw values provided.
        /// </summary>
        /// <param name="data">The raw data to extract values from.</param>
        /// <param name="index">The index to start extracting values from.</param>
        /// <param name="count">The number of bytes available.</param>
        public void SetData(byte[] data, int index, int count)
        {
            using (MemoryStream ms = new MemoryStream(data, index, count, false))
            using (ZipHelperStream helperStream = new ZipHelperStream(ms))
            {
                helperStream.ReadLEInt(); // Reserved
                while (helperStream.Position < helperStream.Length)
                {
                    int ntfsTag = helperStream.ReadLEShort();
                    int ntfsLength = helperStream.ReadLEShort();
                    if (ntfsTag == 1)
                    {
                        if (ntfsLength >= 24)
                        {
                            long lastModificationTicks = helperStream.ReadLELong();
                            _lastModificationTime = DateTime.FromFileTime(lastModificationTicks);

                            long lastAccessTicks = helperStream.ReadLELong();
                            _lastAccessTime = DateTime.FromFileTime(lastAccessTicks);

                            long createTimeTicks = helperStream.ReadLELong();
                            _createTime = DateTime.FromFileTime(createTimeTicks);
                        }
                        break;
                    }
                    else
                    {
                        // An unknown NTFS tag so simply skip it.
                        helperStream.Seek(ntfsLength, SeekOrigin.Current);
                    }
                }
            }
        }
 /// <summary>
 /// Get the binary data representing this instance.
 /// </summary>
 /// <returns>The raw binary data representing this instance.</returns>
 public byte[] GetData()
 {
     using (MemoryStream ms = new MemoryStream())
     using (ZipHelperStream helperStream = new ZipHelperStream(ms))
     {
         helperStream.IsStreamOwner = false;
         helperStream.WriteLEInt(0);       // Reserved
         helperStream.WriteLEShort(1);     // Tag
         helperStream.WriteLEShort(24);    // Length = 3 x 8.
         helperStream.WriteLELong(_lastModificationTime.ToFileTime());
         helperStream.WriteLELong(_lastAccessTime.ToFileTime());
         helperStream.WriteLELong(_createTime.ToFileTime());
         return ms.ToArray();
     }
 }
 /// <summary>
 /// Get the binary data representing this instance.
 /// </summary>
 /// <returns>The raw binary data representing this instance.</returns>
 public byte[] GetData()
 {
     using (MemoryStream ms = new MemoryStream())
     using (ZipHelperStream helperStream = new ZipHelperStream(ms))
     {
         helperStream.IsStreamOwner = false;
         helperStream.WriteByte((byte)_flags);     // Flags
         if ((_flags & Flags.ModificationTime) != 0)
         {
             TimeSpan span = _modificationTime.ToUniversalTime() - new DateTime(1970, 1, 1, 0, 0, 0).ToUniversalTime();
             int seconds = (int)span.TotalSeconds;
             helperStream.WriteLEInt(seconds);
         }
         if ((_flags & Flags.AccessTime) != 0)
         {
             TimeSpan span = _lastAccessTime.ToUniversalTime() - new DateTime(1970, 1, 1, 0, 0, 0).ToUniversalTime();
             int seconds = (int)span.TotalSeconds;
             helperStream.WriteLEInt(seconds);
         }
         if ((_flags & Flags.CreateTime) != 0)
         {
             TimeSpan span = _createTime.ToUniversalTime() - new DateTime(1970, 1, 1, 0, 0, 0).ToUniversalTime();
             int seconds = (int)span.TotalSeconds;
             helperStream.WriteLEInt(seconds);
         }
         return ms.ToArray();
     }
 }
        /// <summary>
        /// Set the data from the raw values provided.
        /// </summary>
        /// <param name="data">The raw data to extract values from.</param>
        /// <param name="index">The index to start extracting values from.</param>
        /// <param name="count">The number of bytes available.</param>
        public void SetData(byte[] data, int index, int count)
        {
            using (MemoryStream ms = new MemoryStream(data, index, count, false))
            using (ZipHelperStream helperStream = new ZipHelperStream(ms))
            {
                // bit 0           if set, modification time is present
                // bit 1           if set, access time is present
                // bit 2           if set, creation time is present

                _flags = (Flags)helperStream.ReadByte();
                if (((_flags & Flags.ModificationTime) != 0) && (count >= 5))
                {
                    int iTime = helperStream.ReadLEInt();

                    _modificationTime = (new DateTime(1970, 1, 1, 0, 0, 0).ToUniversalTime() +
                        new TimeSpan(0, 0, 0, iTime, 0)).ToLocalTime();
                }

                if ((_flags & Flags.AccessTime) != 0)
                {
                    int iTime = helperStream.ReadLEInt();

                    _lastAccessTime = (new DateTime(1970, 1, 1, 0, 0, 0).ToUniversalTime() +
                        new TimeSpan(0, 0, 0, iTime, 0)).ToLocalTime();
                }

                if ((_flags & Flags.CreateTime) != 0)
                {
                    int iTime = helperStream.ReadLEInt();

                    _createTime = (new DateTime(1970, 1, 1, 0, 0, 0).ToUniversalTime() +
                        new TimeSpan(0, 0, 0, iTime, 0)).ToLocalTime();
                }
            }
        }
        /// <summary>
        /// Finishes the stream.  This will write the central directory at the
        /// end of the zip file and flush the stream.
        /// </summary>
        /// <remarks>
        /// This is automatically called when the stream is closed.
        /// </remarks>
        /// <exception cref="System.IO.IOException">
        /// An I/O error occurs.
        /// </exception>
        /// <exception cref="ZipException">
        /// Comment exceeds the maximum length<br/>
        /// Entry name exceeds the maximum length
        /// </exception>
        public override void Finish()
        {
            if (entries == null)
            {
                return;
            }

            if (curEntry != null)
            {
                CloseEntry();
            }

            long numEntries  = entries.Count;
            long sizeEntries = 0;

            foreach (ZipEntry entry in entries)
            {
                WriteLeInt(ZipConstants.CentralHeaderSignature);
                WriteLeShort(ZipConstants.VersionMadeBy);
                WriteLeShort(entry.Version);
                WriteLeShort(entry.Flags);
                WriteLeShort((short)entry.CompressionMethodForHeader);
                WriteLeInt((int)entry.DosTime);
                WriteLeInt((int)entry.Crc);

                if (entry.IsZip64Forced() ||
                    (entry.CompressedSize >= uint.MaxValue))
                {
                    WriteLeInt(-1);
                }
                else
                {
                    WriteLeInt((int)entry.CompressedSize);
                }

                if (entry.IsZip64Forced() ||
                    (entry.Size >= uint.MaxValue))
                {
                    WriteLeInt(-1);
                }
                else
                {
                    WriteLeInt((int)entry.Size);
                }

                byte[] name = ZipConstants.ConvertToArray(entry.Flags, entry.Name);

                if (name.Length > 0xffff)
                {
                    throw new ZipException("Name too long.");
                }

                ZipExtraData ed = new ZipExtraData(entry.ExtraData);

                if (entry.CentralHeaderRequiresZip64)
                {
                    ed.StartNewEntry();
                    if (entry.IsZip64Forced() ||
                        (entry.Size >= 0xffffffff))
                    {
                        ed.AddLeLong(entry.Size);
                    }

                    if (entry.IsZip64Forced() ||
                        (entry.CompressedSize >= 0xffffffff))
                    {
                        ed.AddLeLong(entry.CompressedSize);
                    }

                    if (entry.Offset >= 0xffffffff)
                    {
                        ed.AddLeLong(entry.Offset);
                    }

                    ed.AddNewEntry(1);
                }
                else
                {
                    ed.Delete(1);
                }

#if !NET_1_1 && !NETCF_2_0
                if (entry.AESKeySize > 0)
                {
                    AddExtraDataAES(entry, ed);
                }
#endif
                byte[] extra = ed.GetEntryData();

                byte[] entryComment =
                    (entry.Comment != null) ?
                    ZipConstants.ConvertToArray(entry.Flags, entry.Comment) :
                    new byte[0];

                if (entryComment.Length > 0xffff)
                {
                    throw new ZipException("Comment too long.");
                }

                WriteLeShort(name.Length);
                WriteLeShort(extra.Length);
                WriteLeShort(entryComment.Length);
                WriteLeShort(0);        // disk number
                WriteLeShort(0);        // internal file attributes
                // external file attributes

                if (entry.ExternalFileAttributes != -1)
                {
                    WriteLeInt(entry.ExternalFileAttributes);
                }
                else
                {
                    if (entry.IsDirectory)
                    {                         // mark entry as directory (from nikolam.AT.perfectinfo.com)
                        WriteLeInt(16);
                    }
                    else
                    {
                        WriteLeInt(0);
                    }
                }

                if (entry.Offset >= uint.MaxValue)
                {
                    WriteLeInt(-1);
                }
                else
                {
                    WriteLeInt((int)entry.Offset);
                }

                if (name.Length > 0)
                {
                    baseOutputStream_.Write(name, 0, name.Length);
                }

                if (extra.Length > 0)
                {
                    baseOutputStream_.Write(extra, 0, extra.Length);
                }

                if (entryComment.Length > 0)
                {
                    baseOutputStream_.Write(entryComment, 0, entryComment.Length);
                }

                sizeEntries += ZipConstants.CentralHeaderBaseSize + name.Length + extra.Length + entryComment.Length;
            }

            using (ZipHelperStream zhs = new ZipHelperStream(baseOutputStream_))
            {
                zhs.WriteEndOfCentralDirectory(numEntries, sizeEntries, offset, zipComment);
            }

            entries = null;
        }