System.IO.Compression.GZipStream.FlushAsync C# (CSharp) Method

        public override Task FlushAsync(CancellationToken cancellationToken)
        {
            CheckDeflateStream();
            return _deflateStream.FlushAsync(cancellationToken);
        }

        public void Precancellation()
        {
            var ms = new MemoryStream();

            using (Stream compressor = new GZipStream(ms, CompressionMode.Compress, leaveOpen: true))
            {
                Assert.True(compressor.WriteAsync(new byte[1], 0, 1, new CancellationToken(true)).IsCanceled);
                Assert.True(compressor.FlushAsync(new CancellationToken(true)).IsCanceled);
            }
            using (Stream decompressor = CreateStream(ms, CompressionMode.Decompress, leaveOpen: true))
            {
                Assert.True(decompressor.ReadAsync(new byte[1], 0, 1, new CancellationToken(true)).IsCanceled);
            }
        }