public void VoidOption()
        {
            CommandLineUtilities.Option opt = default(CommandLineUtilities.Option);

            opt.Name  = "Switch";
            opt.Value = null;
            CommandLineUtilities.ParseVoidOption(opt);

            opt.Name  = "Switch";
            opt.Value = string.Empty;
            CommandLineUtilities.ParseVoidOption(opt);

            Assert.Throws <InvalidArgumentException>(() =>
            {
                opt.Name  = "Switch";
                opt.Value = "X";
                CommandLineUtilities.ParseVoidOption(opt);
            });
        }