// @nuget: CommandLineParser -Version 2.9.1

using System;

using System.Collections.Generic;

using System.Linq;

using CommandLine;

​

public class Options

{

    [Option('s', "Strings", Required = false)]

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

}

​

public class Program

{

    public static void Main(string[] args)

    {

        Cmd(new[] { "--Strings", "abc", "def", "ghi" });

    }

​

    public static void Cmd(string[] args)

    {

        var parser = new Parser(with => with.HelpWriter = null);

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

        parserResult.WithParsed(o =>

        {

            var list = o.strs.ToList();

            for (var i = 0; i < list.Count; i++)

            {

                var str = list[i];

                Console.WriteLine($"{i}: {str}");

            }

​

            //expected result:

            //0: abc

            //1: def

            //2: ghi

​

            //actual result:

            //0: abc def ghi

        });

    }

}

​