internal class StartupArguments
{
    public bool Argument1 { get; private set; }
    public bool Argument2 { get; private set; }
    public bool HelpCalled { get; set; }

    // I can't do it private now :(
    private StartupArguments()
    {
    }

    public static StartupArguments Parse(string[] args)
    {
        // Just creates arguments object
        var parser = new FluentCommandLineParser<StartupArguments>(() => new StartupArguments());

        // Setup here

        var parsingResult = parser.Parse(args);

        parser.Object.HelpCalled = parsingResult.HelpCalled;

        return parser.Object;
    }
}