System.IO.Compression.DeflateStream.InitializeDeflater C# (CSharp) Method

        internal void InitializeDeflater(Stream stream, bool leaveOpen, int windowBits, CompressionLevel compressionLevel)
        {
            Debug.Assert(stream != null);
            if (!stream.CanWrite)
                throw new ArgumentException(SR.NotSupported_UnwritableStream, nameof(stream));

            _deflater = new Deflater(compressionLevel, windowBits);

            _stream = stream;
            _mode = CompressionMode.Compress;
            _leaveOpen = leaveOpen;
            InitializeBuffer();
        }