FSO.Files.FAR3.FAR3Archive.FAR3Archive C# (CSharp) Method

        public FAR3Archive(string Path)
        {
            m_ArchivePath = Path;

            if (isReadingSomething == false)
            {
                isReadingSomething = true;

                try
                {
                    m_Reader = new BinaryReader(File.Open(Path, FileMode.Open, FileAccess.Read, FileShare.Read));
                }
                catch (Exception)
                {
                    throw new FAR3Exception("Could not open the specified archive - " + Path + "! (FAR3Archive())");
                }

                string Header = Encoding.ASCII.GetString(m_Reader.ReadBytes(8));
                uint Version = m_Reader.ReadUInt32();

                if ((Header != "FAR!byAZ") || (Version != 3))
                {
                    throw new FAR3Exception("Archive wasn't a valid FAR V.3 archive! (FAR3Archive())");
                }

                uint ManifestOffset = m_Reader.ReadUInt32();
                m_ManifestOffset = ManifestOffset;

                m_Reader.BaseStream.Seek(ManifestOffset, SeekOrigin.Begin);

                uint NumFiles = m_Reader.ReadUInt32();

                for (int i = 0; i < NumFiles; i++)
                {
                    Far3Entry Entry = new Far3Entry();
                    Entry.DecompressedFileSize = m_Reader.ReadUInt32();
                    byte[] Dummy = m_Reader.ReadBytes(3);
                    Entry.CompressedFileSize = (uint)((Dummy[0] << 0) | (Dummy[1] << 8) | (Dummy[2]) << 16);
                    Entry.DataType = m_Reader.ReadByte();
                    Entry.DataOffset = m_Reader.ReadUInt32();
                    //Entry.HasFilename = m_Reader.ReadUInt16();
                    Entry.IsCompressed = m_Reader.ReadByte();
                    Entry.AccessNumber = m_Reader.ReadByte();
                    Entry.FilenameLength = m_Reader.ReadUInt16();
                    Entry.TypeID = m_Reader.ReadUInt32();
                    Entry.FileID = m_Reader.ReadUInt32();
                    Entry.Filename = Encoding.ASCII.GetString(m_Reader.ReadBytes(Entry.FilenameLength));

                    if (!m_Entries.ContainsKey(Entry.Filename))
                        m_Entries.Add(Entry.Filename, Entry);
                    m_EntriesList.Add(Entry);

                    m_EntryByID.Add(Entry.FileID, Entry); //isn't this a bad idea? i have a feeling this is a bad idea...
                }

                //Keep the stream open, it helps peformance.
                //m_Reader.Close();
                isReadingSomething = false;
            }
        }