Use pure C# to extract .tar and .tar.gz files

ExtractTarGz.cs

using System;
using System.IO;
using System.IO.Compression;
using System.Text;

namespace TarExample
{
    public class Tar
    {
        /// <summary>
        /// Extracts a <i>.tar.gz</i> archive to the specified directory.
        /// </summary>
        /// <param name="filename">The <i>.tar.gz</i> to decompress and extract.</param>
        /// <param name="outputDir">Output directory to write the files.</param>
        public static void ExtractTarGz(string filename, string outputDir)
        {
            using (var stream = File.OpenRead(filename))
                ExtractTarGz(stream, outputDir);
        }

        /// <summary>
        /// Extracts a <i>.tar.gz</i> archive stream to the specified directory.
        /// </summary>
        /// <param name="stream">The <i>.tar.gz</i> to decompress and extract.</param>
        /// <param name="outputDir">Output directory to write the files.</param>
        public static void ExtractTarGz(Stream stream, string outputDir)
        {
            using (var gzip = new GZipStream(stream, CompressionMode.Decompress))
            {
                // removed convertation to MemoryStream
                ExtractTar(gzip, outputDir);
            }
        }

        /// <summary>
        /// Extractes a <c>tar</c> archive to the specified directory.
        /// </summary>
        /// <param name="filename">The <i>.tar</i> to extract.</param>
        /// <param name="outputDir">Output directory to write the files.</param>
        public static void ExtractTar(string filename, string outputDir)
        {
            using (var stream = File.OpenRead(filename))
                ExtractTar(stream, outputDir);
        }

        /// <summary>
        /// Extractes a <c>tar</c> archive to the specified directory.
        /// </summary>
        /// <param name="stream">The <i>.tar</i> to extract.</param>
        /// <param name="outputDir">Output directory to write the files.</param>
        public static void ExtractTar(Stream stream, string outputDir)
        {
            var buffer = new byte[100];
            // store current position here
            long pos = 0;
            while (true)
            {
                pos += stream.Read(buffer, 0, 100);
                var name = Encoding.ASCII.GetString(buffer).Trim('\0');
                if (String.IsNullOrWhiteSpace(name))
                    break;
                FakeSeekForward(stream, 24);
                pos += 24;

                pos += stream.Read(buffer, 0, 12);
                var size = Convert.ToInt64(Encoding.UTF8.GetString(buffer, 0, 12).Trim('\0').Trim(), 8);
                FakeSeekForward(stream, 376);
                pos += 376;

                var output = Path.Combine(outputDir, name);
                if (!Directory.Exists(Path.GetDirectoryName(output)))
                    Directory.CreateDirectory(Path.GetDirectoryName(output));
                if (!name.Equals("./", StringComparison.InvariantCulture))
                {
                    using (var str = File.Open(output, FileMode.OpenOrCreate, FileAccess.Write))
                    {
                        var buf = new byte[size];
                        pos += stream.Read(buf, 0, buf.Length);
                        str.Write(buf, 0, buf.Length);
                    }
                }

                var offset = (int)(512 - (pos % 512));
                if (offset == 512)
                    offset = 0;
                FakeSeekForward(stream, offset);
                pos += offset;
            }
        }

        private static void FakeSeekForward(Stream stream, int offset)
        {
            if (stream.CanSeek)
                stream.Seek(offset, SeekOrigin.Current);
            else
            {
                int bytesRead = 0;
                var buffer = new byte[offset];
                while (bytesRead < offset)
                {
                    int read = stream.Read(buffer, bytesRead, offset - bytesRead);
                    if (read == 0)
                        throw new EndOfStreamException();
                    bytesRead += read;
                }
            }
        }
    }
}

single byte array max size is that
https://stackoverflow.com/questions/3944320/maximum-length-of-byte/53967254

hello.. i am trying to decompress at tar.gz file. in it there there is one gz file which comtains one tar file and that tar file contains multiple tsv files. when i try to run your code.. i get error on line 58 saying The archive entry was compressed using an unsupported compression method. .. any advise?

@naveenvermaemail85 probably cannot do anything, this one supports "GZipStream",
other formats are BZip2 or LZMA...and maybe more (so try to look for c# libs to decompress those methods) or SharpCompress can report method also.