gistfile1.txt

`            using (var outStream = new MemoryStream())
            {
                var zipOutputStream = new ZipOutputStream(outStream);
                await outStream.FlushAsync(cancellationToken);
                outStream.Seek(0, SeekOrigin.Begin);
                    zipOutputStream.SetLevel(CompressionMax);
                    foreach (var file in files)
                    {
                        using (var inStream = new MemoryStream())
                        {
                            await _fileStorageApi.ReadToStreamAsync(inStream, file.Location.ContainerName,
                                file.Location.FileName, cancellationToken);
                            var inBuffer = new byte[inStream.Length];
                            inStream.Seek(0, SeekOrigin.Begin);
                            var length = await inStream.ReadAsync(inBuffer, 0, inBuffer.Length, cancellationToken);
                            var entry = new ZipEntry(file.OriginalName)
                            {
                                DateTime = DateTime.Now, Size = inBuffer.Length
                            };
                            zipOutputStream.PutNextEntry(entry);
                            await zipOutputStream.WriteAsync(inBuffer, 0, length, cancellationToken);
                        }
                    }

                outStream.Seek(0, SeekOrigin.Begin);
                var outBuffer = new byte[outStream.Length];
                await outStream.ReadAsync(outBuffer, 0, outBuffer.Length, cancellationToken);
                zipOutputStream.Finish();
                zipOutputStream.Close();
                return outBuffer;`           using (var outStream = new MemoryStream())
            {
                var zipOutputStream = new ZipOutputStream(outStream);
                await outStream.FlushAsync(cancellationToken);
                outStream.Seek(0, SeekOrigin.Begin);
                    zipOutputStream.SetLevel(CompressionMax);
                    foreach (var file in files)
                    {
                        using (var inStream = new MemoryStream())
                        {
                            await _fileStorageApi.ReadToStreamAsync(inStream, file.Location.ContainerName,
                                file.Location.FileName, cancellationToken);
                            var inBuffer = new byte[inStream.Length];
                            inStream.Seek(0, SeekOrigin.Begin);
                            var length = await inStream.ReadAsync(inBuffer, 0, inBuffer.Length, cancellationToken);
                            var entry = new ZipEntry(file.OriginalName)
                            {
                                DateTime = DateTime.Now, Size = inBuffer.Length
                            };
                            zipOutputStream.PutNextEntry(entry);
                            await zipOutputStream.WriteAsync(inBuffer, 0, length, cancellationToken);
                        }
                    }

                outStream.Seek(0, SeekOrigin.Begin);
                var outBuffer = new byte[outStream.Length];
                await outStream.ReadAsync(outBuffer, 0, outBuffer.Length, cancellationToken);
                zipOutputStream.Finish();
                zipOutputStream.Close();
                return outBuffer;