Mono.Options試し書き

Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Mono.Options;

namespace CommandLineOption
{
    class Program
    {
        static void Main(string[] args) {
            string name = "";
            int year = 0;
            bool showHelp = false;
            var p = new OptionSet()
                    {
                        {"n|name=", "your name", v => name = v},
                        {"y|year=", "your birth year", (int v) => year = v},
                        {"h|help", "show help.", v => showHelp = v != null}
                    };
            List<string> extra;
            try {
                extra = p.Parse(args);
            }
            catch (OptionException e) {
                Console.WriteLine("CommandLineOption:");
                Console.WriteLine(e.Message);
                Console.WriteLine("Try `CommandLineOption --help' for more information.");
                return;
            }

            if (showHelp) {
                ShowHelp(p);
                return;
            }

            string message;
            if (extra.Count > 0) {
                message = string.Join("", extra.ToArray());
            }
            else {
                message = "";
            }

            int thisYear = DateTime.Now.Year;

            Console.WriteLine("Hello, {0}, You are {1} years old.\n{2}", name, thisYear - year, message);
        }

        private static void ShowHelp(OptionSet p) {
            Console.WriteLine("Usage: CommnadLineOption [OPTIONS] + message");
            Console.WriteLine( );
            p.WriteOptionDescriptions(Console.Out);
        }
    }
}