Gzip compression/decompression

Gzip.cs

using System.IO.Compression;

public static class Gzip
{
    private static async Task<byte[]> DecompressBytesAsync(byte[] bytes, CancellationToken cancel = default)
    {
        using var inputStream = new MemoryStream(bytes);
        using var outputStream = new MemoryStream();
        await using (var compressionStream = new GZipStream(inputStream, CompressionMode.Decompress))
        {
            await compressionStream.CopyToAsync(outputStream, cancel);
        }
        return outputStream.ToArray();
    }

    public static async Task<byte[]> CompressBytesAsync(byte[] bytes, CancellationToken cancel = default)
    {
        using var outputStream = new MemoryStream();
        await using (var compressionStream = new GZipStream(outputStream, CompressionLevel.Optimal))
        {
            await compressionStream.WriteAsync(bytes, 0, bytes.Length, cancel);
        }
        return outputStream.ToArray();
    }
}