minimum Command Line Parser

MiniCommandLine.cs

using System.Collections.Generic;

namespace Nekomimi.Daimao
{
    /// <summary>
    /// parsing comannd line into a dictionary.
    /// </summary>
    public static class MiniCommandLine
    {
        /// <summary>
        /// -key value -> (key, value)
        /// -key       -> (key, null)
        /// </summary>
        public static Dictionary<string, string> Command => ParseArguments(System.Environment.GetCommandLineArgs());

        // ReSharper disable once MemberCanBePrivate.Global
        public static Dictionary<string, string> ParseArguments(IReadOnlyList<string> args)
        {
            const string prefixOption = "-";
            var parseArguments = new Dictionary<string, string>();

            for (var count = 0; count < args.Count; count++)
            {
                var key = args[count];
                if (string.IsNullOrEmpty(key) || !key.StartsWith(prefixOption))
                {
                    continue;
                }

                string value = null;
                if (count + 1 < args.Count)
                {
                    value = args[count + 1];
                    if (string.IsNullOrEmpty(value) || value.StartsWith(prefixOption))
                    {
                        value = null;
                    }
                }
                parseArguments[key.Substring(prefixOption.Length)] = value;
            }

            return parseArguments;
        }
    }
}

Example

// example command line
var commandLineArgs = "-name hachi -type dog -pet";
var argArray = commandLineArgs.Split(new char[] { ' ', '　' }, StringSplitOptions.RemoveEmptyEntries);

// [name, hachi]
// [type, dog]
// [pet,  null]
var parsedArg = MiniCommandLine.ParseArguments(argArray);