MorseCodeChallenge

namespace MorseCodeChallenge
{
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Threading;

    public class MorseCodeChallenge
    {
        private const int SleepInterval = 750;
        private const int LongBeepDuration = 1200;
        private const int ShortBeepDuration = 600;
        private const int BeepFrequency = 1200;

        private static readonly Dictionary<char, string> MorseCodes = new Dictionary<char, string>()
            {
                {'A', ".-"},
                {'B', "-..."},
                {'C', "-.-."},
                {'D', "-.."},
                {'E', "."},
                {'F', "..-."},
                {'G', "--."},
                {'H', "...."},
                {'I', ".."},
                {'J', ".---"},
                {'K', "-.-"},
                {'L', ".-.."},
                {'M', "--"},
                {'N', "-."},
                {'O', "---"},
                {'P', ".--."},
                {'Q', "--.-"},
                {'R', ".-."},
                {'S', "..."},
                {'T', "-"},
                {'U', "..--"},
                {'V', "...-"},
                {'W', ".--"},
                {'X', "-..-"},
                {'Y', "-.--"},
                {'Z', "--.."},
                {' ',  "/"}
            };

        public static void Main()
        {
            string message = Console.ReadLine().ToUpper();

            foreach (var symbol in message.Where(symbol => MorseCodes.ContainsKey(symbol)))
            {
                PlaySound(symbol);
            }
        }

        private static void PlaySound(char symbol)
        {
            foreach (var sound in MorseCodes[symbol])
            {
                switch (sound)
                {
                    case '-':
                        Console.Beep(BeepFrequency, LongBeepDuration);
                        break;
                    case '.':
                        Console.Beep(BeepFrequency, ShortBeepDuration);
                        break;
                    case '/':
                        Thread.Sleep(SleepInterval);
                        break;
                }
            }
        }
    }
}