using System;

using System.Linq;

using System.IO;

using System.Collections.Generic;

​

​

public class Program

{

    public static void Main(string[] args)

    {

        string input = "aa c6 61 ab 25 d8 d2 b4 c4 9c e2 d4 5a 00 00 00 00 ff ff";

        byte[] bytes = input.Split(new char[] { ' ' }).Select(x => byte.Parse(x, System.Globalization.NumberStyles.HexNumber)).ToArray();

        MemoryStream ms = new MemoryStream(bytes);

        ms.Position = 0;

        System.IO.Compression.DeflateStream gzip = new System.IO.Compression.DeflateStream(ms, System.IO.Compression.CompressionMode.Decompress);

        List<byte> uncompressed = new List<byte>();

        int bytesRead = 0;

        do

        {

            byte[] chunk = new byte[1000];

            bytesRead = gzip.Read(chunk, 0, 1000);

            uncompressed.AddRange(chunk.ToList().GetRange(0, bytesRead));

        } while (bytesRead == 1000);

    }

}

​

​