This plugin installs the 7z interop dll's 9.38 into your project. This way you can use SevenZipSharp without installing 7zip.
// Toggle between the x86 and x64 bit dll
var path = Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location),Environment.Is64BitProcess ? "x64" : "x86", "7z.dll");
SevenZip.SevenZipBase.SetLibraryPath(path);