// @nuget: CommandLineParser -Version 2.8.0

​

using System;

​

using System.Collections.Generic;

using CommandLine;

using System.Globalization;

using System.Text;

​

public class Program

{

    public static void Main()

    {

        Console.OutputEncoding = Encoding.Unicode;       

        Console.WriteLine("CurrentCulture is '{0}'", CultureInfo.CurrentCulture.Name);

       //Infinity

        string arg = "-e ∞ -m 50 -p -w 0.25";

        var args= arg.Split();

      //  var args = "-m 50 -p -w 0.25".Split(); //need not to pass epsilon when has default value infinity       ;

        var parser = new Parser(with =>

        {

            with.HelpWriter = Console.Out;

            //setup culture for parser, e.g. en-US

            with.ParsingCulture = new CultureInfo("en-US"); //modify to use your cultureinfo

        });

        var result = parser.ParseArguments<Options>(args);

​

        result.WithParsed(options =>

        {

            Console.WriteLine("Parser Success");

            Console.WriteLine("Epsilon isinfinity= {0}", Double.IsInfinity(options.Epsilon));

            Console.WriteLine("Epsilon= {0}", options.Epsilon);

        }

​

        ).WithNotParsed(errs => Console.WriteLine("Failed with errors:\n{0}",

            String.Join("\n", errs)));

    }

​

​

    class Options

    {

        [Option('e', "epsilon",Default=Double.PositiveInfinity)]

        public double Epsilon { get; set; }

        [Option('m')]

        public int M { get; set; }

        [Option('p')]

        public bool P { get; set; }

        [Option('w')]

        public double W { get; set; }        

    }

}