using System;

using System.Collections.Generic;

using System.Text;

using System.IO;

​

public class Program

{

    public static void Main()

    {

        Menu mainMenu= new Menu("Main Menu");

        mainMenu.add("1", "First Choice") 

            .add("2", "Mine Sweeper")

            .add("3", "Explorer")

            .add("4", "Date Time")

            .add("Q", "Quit to DOS");;

        KeyValuePair<string,string> choice = mainMenu.Invoke();

        Console.WriteLine("");

        Console.WriteLine ("You choice: " + choice.Key + ". " + choice.Value);

        switch (choice.Key.ToString())

        {

            case "1":  

                Console.WriteLine("ok 1"); 

                break;

            case "2": 

                Console.WriteLine("ok 2"); 

                break;

            default:

                Console.WriteLine("Huh?");

                break;

        }

    }

}

​

public class Menu

{

    private string _title;

    private SortedList<string, string> _options;

    private bool _allowEscapeOrBlank;

    public Menu(string Title)

    {

        this._title = Title;

        this._options = new SortedList<string, string>();

        this._allowEscapeOrBlank = false;

    }

    public Menu add(String key, String option)

    {

        this._options.Add(key, option);

        return this;

    }

    public KeyValuePair<string, string> Invoke() {

        int width = this.MaxOptionLength();

        string headbar = new String('─',  (width - this._title.Length - 2)/ 2);

        Console.WriteLine("┌" + headbar + "[ " + this._title + " ]" + headbar + "┐");

        Console.WriteLine("│" + new String(' ', width + 1) + "│");

        foreach (KeyValuePair<string, string> kvp in this._options){

            Console.WriteLine("│ " + kvp.Key + ". " + kvp.Value + new String(' ', width - kvp.Value.Length - 3) +"│");

        }

        Console.WriteLine("│" + new String(' ', width + 1) + "│");

        Console.WriteLine("├" + new StringBuilder().Insert(0," ─",width/2).ToString() + " ┤");

        Console.WriteLine("│ Which Option? " + new String(' ', width - 14) + "│");

        Console.WriteLine("└" + new String('─', width + 1) + "┘");

        string Answer;

        do {

            Answer = Console.ReadLine();

            foreach (KeyValuePair<string, string> kvp in this._options){

                if (kvp.Key == Answer){ return kvp; }

            }

            Console.WriteLine("Invalid Option");

        }

        while (true);

​

    }

    private int MaxOptionLength(){

        int max = 0;

        int kvSize = 0;

        foreach (KeyValuePair<string, string> kvp in this._options){

            kvSize = kvp.Key.Length +  kvp.Value.Length;

            if (kvSize > max){ max = kvSize; }

        }

        return max + 5;

    }

}