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public static byte[] Compress(byte[] data)
        {
            byte[] compressedBytes;

            using (var uncompressedStream = new MemoryStream(data))
            {
                using (var compressedStream = new MemoryStream())
                {
                    // setting the leaveOpen parameter to true to ensure that compressedStream will not be closed when compressorStream is disposed
                    // this allows compressorStream to close and flush its buffers to compressedStream and guarantees that compressedStream.ToArray() can be called afterward
                    // although MSDN documentation states that ToArray() can be called on a closed MemoryStream, I don't want to rely on that very odd behavior should it ever change
                    using (var compressorStream = new GZipStream(compressedStream, CompressionLevel.Optimal, true))
                    {
                        uncompressedStream.CopyTo(compressorStream);
                    }

                    // call compressedStream.ToArray() after the enclosing DeflateStream has closed and flushed its buffer to compressedStream
                    compressedBytes = compressedStream.ToArray();
                }
            }

            return compressedBytes;
        }

Code: Select all

        public static byte[] Compress(byte[] data)
        {
            byte[] outdata;
            using (MemoryStream outMemoryStream = new MemoryStream())
            using (ZOutputStream outZStream = new ZOutputStream(outMemoryStream, zlibConst.Z_DEFAULT_COMPRESSION))
            using (Stream inMemoryStream = new MemoryStream(data))
            {
                CopyStream(inMemoryStream, outZStream);
                outZStream.finish();
                outdata = outMemoryStream.ToArray();
            }
            return outdata;
        }