BitSharper.Store.BoundedOverheadBlockStore.Load C# (CSharp) Method

        private void Load(FileInfo file)
        {
            _log.InfoFormat("Reading block store from {0}", file);
            if (_channel != null)
            {
                _channel.Dispose();
            }
            _channel = file.OpenRead();
            try
            {
                // Read a version byte.
                var version = _channel.Read();
                if (version == -1)
                {
                    // No such file or the file was empty.
                    throw new FileNotFoundException(file.Name + " does not exist or is empty");
                }
                if (version != _fileFormatVersion)
                {
                    throw new BlockStoreException("Bad version number: " + version);
                }
                // Chain head pointer is the first thing in the file.
                var chainHeadHash = new byte[32];
                if (_channel.Read(chainHeadHash) < chainHeadHash.Length)
                    throw new BlockStoreException("Truncated store: could not read chain head hash.");
                _chainHead = new Sha256Hash(chainHeadHash);
                _log.InfoFormat("Read chain head from disk: {0}", _chainHead);
                _channel.Position = _channel.Length - Record.Size;
            }
            catch (IOException)
            {
                _channel.Close();
                throw;
            }
            catch (BlockStoreException)
            {
                _channel.Close();
                throw;
            }
        }