SharpZipLib

CompressUtil.cs

using ICSharpCode.SharpZipLib.Zip
using ICSharpCode.SharpZipLib.Zip.Compression
using ICSharpCode.SharpZipLib.Zip.Compression.Streams
using System.Threading.Tasks

public class CompressUtil
{
	public static async Task<byte[]> DecompressData(byte[] bytes)
	{
		using var stream = new InflaterInputStream(new MemoryStream(bytes));
		using var memory = new MemoryStream();
		var buffer = new byte[4096];
		while (true)
		{
			int size = await stream.ReadAsync(buffer, 0, buffer.Length);
			if (size > 0)
			{
				await memory.WriteAsync(buffer, 0, size);
			}
			else
				break;
		}
		stream.Close();
		return memory.ToArray();
	}

	public static async Task<byte[]> CompressData(byte[] data)
	{
		using var memory = new MemoryStream();
		using var stream = new DeflaterOutputStream(memory, new Deflater());
		await stream.WriteAsync(data, 0, data.Length);
		await stream.FlushAsync();
		stream.Close();
		return memory.ToArray();
	}
}