enigma machine

using System;
using System.IO;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace EnigmaMachine
{
    class Driver
    {
        static void Main(string[] args)
        {
            GetMenu menu = new GetMenu();
            GetMenu.DisplayMenu();

        }

    }
    class GetMenu
    {
        static Boolean exit;

        public static void DisplayMenu()
        {
            while(!exit)
            {
                ReadMenu();
                int choice = ReceiveInput();
                PerformAction(choice);
            }
        }
        public static void ReadMenu()
        {
            String line;
            try
            {
                StreamReader sr = new StreamReader("H:\\MainScreen.txt");
                line = sr.ReadLine();
                while(line != null)
                {
                    Console.WriteLine(line);
                    line = sr.ReadLine();
                }
                sr.Close();
                Console.ReadLine();
            }
            catch (Exception e)
            {
                Console.WriteLine("Exception: " + e.Message);
            }
            finally
            {
                Console.WriteLine("Executing finally block.");
            }
        }
        private static int ReceiveInput()
        {
            int choice = -1;
            while(choice < 0 || choice > 7)
            {
                try
                {
                    choice = Int32.Parse(Console.ReadLine());
                }
                catch (FormatException e)
                {
                    Console.WriteLine("Invalid selection. Please try again.");
                }
            }
            return choice;
        }
        private static void PerformAction(int choice)
        {
            switch(choice)
            {
                case 0:
                    exit = true;
                    Console.WriteLine("Thank you for using the Enigma Machine.");
                    break;
                case 1:
            }
        }
    }
    class Interpreter
    {

    }
}