System.IO.Compression.ZipArchive.ReadCentralDirectory C# (CSharp) Method

        private void ReadCentralDirectory()
        {
            try
            {
                //assume ReadEndOfCentralDirectory has been called and has populated _centralDirectoryStart

                _archiveStream.Seek(_centralDirectoryStart, SeekOrigin.Begin);

                long numberOfEntries = 0;

                //read the central directory
                ZipCentralDirectoryFileHeader currentHeader;
                bool saveExtraFieldsAndComments = Mode == ZipArchiveMode.Update;
                while (ZipCentralDirectoryFileHeader.TryReadBlock(_archiveReader,
                                                        saveExtraFieldsAndComments, out currentHeader))
                {
                    AddEntry(new ZipArchiveEntry(this, currentHeader));
                    numberOfEntries++;
                }

                if (numberOfEntries != _expectedNumberOfEntries)
                    throw new InvalidDataException(SR.NumEntriesWrong);
            }
            catch (EndOfStreamException ex)
            {
                throw new InvalidDataException(SR.Format(SR.CentralDirectoryInvalid, ex));
            }
        }