// @nuget: CommandLineParser -Version 2.6.0

using System;

using CommandLine;

using System.Collections.Generic;

​

    public class Program

    {

        public static void Main()

        {

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

           // (1) default options

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

​

        // or (2) build and configure instance

        //var parser = new Parser(with => with.EnableDashDash = true);

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

        result.MapResult(

         options => RunAndReturnExitCode(options),

         _ => 1);

        }  

     static int RunAndReturnExitCode(Options options)

     {

         options.Dump();

         return 0;

     }

    }

​

class Options 

{

     [Option]

  public string UserId { get; set; }

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

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

}