Merge TAR.BZ2 files to one 7ZIP archive via C#

Merge two TAR.BZ2 archives to ZIP - C#

     {
	string intermediateStorage = "storage";
	DirectoryInfo stored = Directory.CreateDirectory(intermediateStorage);
	using (MemoryStream ms = new MemoryStream())
	{
		using (Bzip2Archive source1 = new Bzip2Archive("source1.tar.bz2"))
			source1.Extract(ms);
		ms.Seek(0, SeekOrigin.Begin);
		using (TarArchive tar1 = new TarArchive(ms))
			tar1.ExtractToDirectory(intermediateStorage);
	}

	using (MemoryStream ms = new MemoryStream())
	{
		using (Bzip2Archive source2 = new Bzip2Archive("source2.tar.bz2"))
			source2.Extract(ms);
		ms.Seek(0, SeekOrigin.Begin);
		using (TarArchive tar2 = new TarArchive(ms))
			tar2.ExtractToDirectory(intermediateStorage);
	}

	using (SevenZipArchive merged = new SevenZipArchive(new SevenZipEntrySettings(new SevenZipLZMA2CompressionSettings())))
	{
		merged.CreateEntries(stored, false);
		merged.Save("merged8.7z");
	}

	stored.Delete(true);
}