// @nuget: CommandLineParser -Version 2.9.0-preview1

​

using System;

using System.Collections.Generic;

using System.Threading.Tasks;

using CommandLine;

​

public class Program

{

    public static void Main()

    {

        //var args = "--userid=root -t int:long:string".Split();

        var args = "--userid=root -t int -t long -t string".Split();

        //configure multi instance

        var parser= new Parser(with =>{

            with.AllowMultiInstance =true;

        });

        var retValue =  parser.ParseArguments<Options>(args).MapResult(RunAndReturnExitCode, _ => 1);

        Console.WriteLine($"retValue={retValue}");

    }

​

    //Should be Task<T>, for MapResult

    static int RunAndReturnExitCode(Options options)

    {       

        Console.WriteLine($"UserId={options.UserId}");

        foreach (var type in options.Types)

          Console.WriteLine($"{type}");     

        return 0;

    }

}

​

class Options

{

    [Option]

    public string UserId

    {

        get;

        set;

    }

​

    [Option('t', Separator = ':')]

    public IEnumerable<string> Types

    {

        get;

        set;

    }

}