Options.cs

namespace TestingApplication
{
    using CommandLine;
    using CommandLine.Text;

    public class Options
    {
        [VerbOption("testverbone", HelpText = "Test Verb One.")]
        public RssSubOptions RssVerb { get; set; }

        [HelpOption]
        public string GetUsage()
        {
            return HelpText.AutoBuild(this, current => HelpText.DefaultParsingErrorsHandler(this, current));
        }

        [HelpVerbOption]
        public string GetUsage(string verb)
        {
            return HelpText.AutoBuild(this, verb);
        }
    }
}

Program.cs

namespace TestingApplication
{
    using System;
    using CommandLine;

    class Program
    {
        static void Main(string[] args)
        {
            String invokedVerb;
            Object invokedVerbInstance;
            Options options = new Options();

            if (!Parser.Default.ParseArguments(args, options, (verb, subOptions) =>
            {
                invokedVerb = verb;
                invokedVerbInstance = subOptions;
            }))
            {
                Environment.Exit(CommandLine.Parser.DefaultExitCodeFail);
            }
        }
    }
}

TestVerbOneSubOptions.cs

namespace TestingApplication
{
    using System;
    using CommandLine;

    public class TestVerbOneSubOptions
    {
        [Option('b', "begin-date", HelpText = "Begin date.")]
        public DateTime BeginDate { get; set; }

        [Option('n', "no-update", HelpText = "No update.")]
        public bool NoUpdate { get; set; }

        [Option('s', "silent", HelpText = "Silence!")]
        public bool Silent { get; set; }

        [Option('c', "criteria", HelpText = "Criteria.")]
        public bool Criteria { get; set; }
    }
}