using System;

using System.Collections.Generic;

using System.Linq;

using CommandLine;

​

public class Program

{

    public static void Main()

    {

        int runcount = 1;

        //run a bunch of different commandline args through a simulated Maine entry point

        foreach(var args in new List<string[]> { 

            //experiment with different command line values here

            new string[0]

            ,new string[] { "AssemblyInfo.cs", "myproject.csproj" }

            ,new string[] { "-a", "App_Data/cachefile.json" }

            ,new string[] { "-m", "App_Data/cachefile.json", "App_Data/cachefile2.json" }

        }) {

            Console.WriteLine("*** RUN #{0}, args: {1}",runcount++,String.Join(" ",args));

            __YourMain(args);

            Console.WriteLine("");

        }

    }

    public static void __YourMain(string[] args)

    {

        Console.WriteLine("");

        var parserResult = CommandLine.Parser.Default

            .ParseArguments<TouchOptions>(args)

            .WithParsed((TouchOptions opts) => { RunCommand(opts); })

            .WithNotParsed((errs) => { errs.Dump(); });

    }

    static int RunCommand(TouchOptions TouchOptions)

    {

        Console.WriteLine("only change access time:        {0}", IfTrue(TouchOptions.OnlyAccessTime));

        Console.WriteLine("only change modification time:  {0}", IfTrue(TouchOptions.OnlyModificationTime));

        Console.WriteLine("do not create any files:        {0}", IfTrue(TouchOptions.DontCreate));

        Console.WriteLine("files:");

        Console.WriteLine("=>" + String.Join(",", TouchOptions.Filenames.Select(_=>"\""+_+"\"")));

        return 0;

    }

    static string IfTrue(bool value) { if(value) return value.ToString(); else return "--"; }

}

​

public class TouchOptions

{

    [Value(0)]

    public IEnumerable<string> Filenames { get; set; }

    [Option('c',"no-create",HelpText="")]

    public bool DontCreate { get; set; }

    [Option('a',HelpText="change only the access time")]

    public bool OnlyAccessTime { get; set; }

    [Option('m',HelpText="")]

    public bool OnlyModificationTime { get; set; }

}

​

​