Extends Mono.Options, a better command line parser.

AttributeOptionSet.cs

using System;
using System.Linq;
using Mono.Options;

namespace xcud
{
    public class AttributedOptionSet : OptionSet
    {
        public static T Parse<T>(string[] args) where T : AttributedOptionSet, new()
        {
            var retval = new T();

            typeof(T).GetFields().ToList().ForEach(propertyInfo =>
            {
                var propertyAttribs = propertyInfo.GetCustomAttributes(false);

                var optionAttribute =
                    propertyAttribs.FirstOrDefault(a => a is OptionAttribute) as OptionAttribute;
                if (optionAttribute == null)
                    return;

                retval.Add(optionAttribute.Prototype, optionAttribute.Description, p =>
                    {
                        if (optionAttribute.Prototype.EndsWith("="))
                            propertyInfo.SetValue(retval, p);
                        else
                            propertyInfo.SetValue(retval, true);
                    });
            });

            retval.Parse(args);
            return retval;
        }
    }

    public class OptionAttribute : Attribute
    {
        public string Prototype = null;
        public string Description = null;
        public OptionAttribute(string prototype, string description)
        {
            Prototype = prototype;
            Description = description;
        }
    }
}