Car Tracker Application

Program.cs

namespace CarTracker
{
    using System;
    using System.Linq;

    public class Application
    {
        public static void Main()
        {
            new Application().Run();
        }

        public void Run()
        {
            Console.WriteLine("Car Tracker");

            var command = string.Empty;
            while (!string.Equals(command, "exit", StringComparison.OrdinalIgnoreCase))
            {
                try
                {
                    this.Handle(command);
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.Message);
                }

                Console.Write("> ");
                command = Console.ReadLine().Trim();
            }

            Console.WriteLine("Goodbye!");
        }

        private void Handle(string command)
        {
            var commandParts = command.Split(new[] { ' ' });
            switch (commandParts.First().ToLowerInvariant())
            {
            case "?":
            case "help":
                Console.WriteLine(@"Commands:
list               - lists all the registered cars
register [reg]     - registers a car with the [reg]
drive [reg] [dist] - drives the car with the [reg] the specified [dist]
scrap [reg]        - scraps the car with the [reg]");
                break;

            case "list":
                // list cars
                break;

            case "register":
                if (commandParts.Length < 2)
                {
                    Console.WriteLine("Please specify the registration.");
                    break;
                }

                // register car: commandParts[1]
                Console.WriteLine("Registered {0}.", commandParts[1]);
                break;

            case "drive":
                if (commandParts.Length < 3)
                {
                    Console.WriteLine("Please specify the registration and the distance.");
                    break;
                }

                var distance = 0;
                if (!int.TryParse(commandParts[2], out distance))
                {
                    Console.WriteLine("Distance must be a number.");
                    break;
                }

                // drive car: commandParts[1] distance
                Console.WriteLine("Drove {0} a distance of {1:G}km.", commandParts[1], distance);
                break;

            case "scrap":
                if (commandParts.Length < 2)
                {
                    Console.WriteLine("Please specify the registration.");
                    break;
                }

                // scrap car: commandParts[1]
                Console.WriteLine("Scrapped {0}.", commandParts[1]);
                break;

            case "":
                break;

            default:
                Console.WriteLine("Eh?");
                break;
            }
        }
    }
}