public static Stream Concatenation( IAsyncEnumerable <Stream> streams, ArrayPool <byte> pool, int chunkSize, CancellationToken token = default) { if (streams == null) { throw new ArgumentNullException(nameof(streams)); } if (pool == null) { throw new ArgumentNullException(nameof(pool)); } ValidateChunkSize(chunkSize, nameof(chunkSize)); return(UsingStream() // ReSharper disable once MethodSupportsCancellation .On(streams.Chunks(pool, chunkSize)) .WithCancellation(token) .Build()); }