BaseConsole class used for simple command line interface. See the Program class below for a simple usage

BaseConsole.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using C = System.Console;

namespace Tafe120.Console
{
    /// <summary>
    /// Base class for a command line interface
    /// </summary>
    public abstract class BaseConsole
    {

        #region Constructor

        public BaseConsole()
        {
            Commands = new Dictionary<string, Action>()
            {
                {"help", () => PrintCommands()}
            };
            LoadCommands();
        }

        #endregion

        #region Console Properties

        public abstract string Name { get; }

        #endregion

        #region Commands

        protected static readonly string[] exitCommands = new string[] { "done", "exit", "quit" };

        public Dictionary<string, Action> Commands
        {
            get;
            protected set;
        }

        protected abstract void LoadCommands();

        #endregion

        #region Command Processing

        protected virtual void ProcessCommand(string cmd)
        {
            Action action = null;
            if (Commands.TryGetValue(cmd, out action))
            {
                action();
            }
            else
            {
                System.Console.WriteLine("Unknown command");
            }
        }

        protected virtual void PrintCommands()
        {
            System.Console.WriteLine("Available Commands:");
            foreach (var c in Commands)
            {
                System.Console.WriteLine("\t" + c.Key);
            }

        }

        #endregion

        #region Run

        public void Run()
        {

            C.WriteLine(Name);
            C.WriteLine("=====================================");
            C.WriteLine("Type 'help' to get available commands");
            C.WriteLine("Type 'exit','done' or 'quit' to exit");
            C.WriteLine();

            C.Write(">>");
            string input = C.ReadLine();

            // While not exit command entered, process each command
            while (!exitCommands.Contains(input, StringComparer.CurrentCultureIgnoreCase))
            {
                try
                {

                    // process command
                    ProcessCommand(input);

                }
                catch (Exception ex)
                {
                    C.WriteLine(ex.ToString());

                }
                finally
                {
                    C.WriteLine();
                    C.Write(">>");
                    input = C.ReadLine();
                }
            }



            Finished();

        }


        #endregion


        #region Finished

        protected virtual void Finished()
        {
        }


        #endregion

    }
}

Program.cs

class Program : BaseConsole
    {
       
        static void Main(string[] args)
        {
            new Program().Run();
        }

        public override string Name
        {
            get { return "Console App"; }
        }

        protected override void LoadCommands()
        {
        	// add the command into the command dictionary
            Commands.Add("hello", () =>
            	{
                	System.Console.WriteLine("Hi there user");
                });
        }

    }