Cmdline.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Npgsql;
using CommandLine;
using CommandLine.Text;

// http://commandline.codeplex.com/
namespace Project1
{

    // Define a class to receive parsed values
    class Options
    {
        [Option('r', "read", Required = true,
          HelpText = "Input file to be processed.")]
        public string InputFile { get; set; }

        [Option('v', "verbose", DefaultValue = true,
          HelpText = "Prints all messages to standard output.")]
        public bool Verbose { get; set; }

        [ParserState]
        public IParserState LastParserState { get; set; }

        [HelpOption]
        public string GetUsage()
        {
            return HelpText.AutoBuild(this,
              (HelpText current) => HelpText.DefaultParsingErrorsHandler(this, current));
        }
    }

    class Class1
    {
        static void Main(string[] args)
        {
            var options = new Options();
            if (CommandLine.Parser.Default.ParseArguments(args, options))
            {
                // Values are available here
                if (options.Verbose) Console.WriteLine("Filename: {0}", options.InputFile);
            }
            Console.WriteLine("aa bb cc");
        }
    }
}