Options.cs

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

namespace Todo
{
    class Options
    {
        [Option("u", "UserId", Required = false, HelpText = "UserId")]
        public string username = null;

        [Option("p", "password", HelpText = "password")]
        public string password = null;

        [OptionList("t", "tags", Separator = ',', HelpText = "Specify tags, separated by a comma")]
        public IList<string> tags = null;

        [Option("f", "folder", HelpText = "Specify Folder")]
        public string folder = null;

        [Option("c", "context", HelpText = "Specify Context")]
        public string context = null;

        [Option("d", "duedate", HelpText = "Specify Due Date")]
        public string duedate = null;

        [Option("l", "length", HelpText = "Specify Length in minutes")]
        public string length = null;

        [Option("s", "set", HelpText = "Specify default folder or context in the format -s Folder:Inbox")]
        public string settings = null;

        [ValueList(typeof(List<string>), MaximumElements = -1)]
        public IList<string> task = null;

        [HelpOption(HelpText = "Display this help screen.")]
        public string GetUsage()
        {
            StringBuilder usageString = new StringBuilder();
            try
            {
                using (TextReader sr = new StreamReader("README.md"))
                {
                    String line;
                    while ((line = sr.ReadLine()) != null)
                    {
                        usageString.Append(line);
                        usageString.Append("\n");
                    }
                }
            }
            catch (Exception e)
            {
                usageString.Append("The file could not be read:");
                usageString.Append(e.Message);
            }
            return usageString.ToString();
        }
    }
}