Create and Extract GZip in C#

create-gzip.cs

using (GzipArchive archive = new GzipArchive())
{
    // set source
    archive.SetSource("data.bin");
    
    // create archive
    archive.Save("archive.gz");
}

extract-gzip-to-stream.cs

// create a memory stream
var ms = new MemoryStream();

// load GZip archive
using (GzipArchive archive = new GzipArchive(File.OpenRead("sample.gz")))
{
    // extract and copy to memory stream
    archive.Open().CopyTo(ms);
    Console.WriteLine(archive.Name);
}

extract-gzip.cs

// load the GZip archive
using (var archive = new GzipArchive("archive.gz"))
{
    // create a file
    using (var extracted = File.Create("data.bin"))
    {
        // open archive
        var unpacked = archive.Open();
        byte[] b = new byte[8192];
        int bytesRead;
        
        // write to file
        while (0 < (bytesRead = unpacked.Read(b, 0, b.Length)))
            extracted.Write(b, 0, bytesRead);
    }
}