CmisSync.Lib.FileTransmission.ChunkedDownloader.DownloadNextChunk C# (CSharp) Méthode

        private int DownloadNextChunk(IDocument remoteDocument, long offset, long remainingBytes, Transmission transmission, Stream outputstream, HashAlgorithm hashAlg) {
            lock(this.disposeLock) {
                if (this.disposed) {
                    transmission.Status = TransmissionStatus.ABORTED;
                    throw new ObjectDisposedException(transmission.Path);
                }

                IContentStream contentStream = remoteDocument.GetContentStream(remoteDocument.ContentStreamId, offset, remainingBytes);
                transmission.Length = remoteDocument.ContentStreamLength;
                transmission.Position = offset;

                using (var remoteStream = contentStream.Stream)
                using (var forwardstream = new ForwardReadingStream(remoteStream))
                using (var offsetstream = new OffsetStream(forwardstream, offset))
                using (var progress = transmission.CreateStream(offsetstream)) {
                    byte[] buffer = new byte[8 * 1024];
                    int result = 0;
                    int len;
                    while ((len = progress.Read(buffer, 0, buffer.Length)) > 0) {
                        outputstream.Write(buffer, 0, len);
                        hashAlg.TransformBlock(buffer, 0, len, buffer, 0);
                        result += len;
                        outputstream.Flush();
                    }

                    return result;
                }
            }
        }
    }