Morse code, C# - rextester

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        static Dictionary<char, string> translator;
        public static void Main(string[] args)
        {
            //Your code goes here
            InitialiseDictionary();
            getUserInput();
            Console.WriteLine("Hello, world!");
        }
        
        private static void InitialiseDictionary()
        {
            char dot = '.';
            char dash = '−';

translator = new Dictionary<char, string>()
            {
                {'a', string.Concat(dot, dash)},
                {'b', string.Concat(dash, dot, dot, dot)},
                {'c', string.Concat(dash, dot, dash, dot)},
                {'d', string.Concat(dash, dot, dot)},
                {'e', dot.ToString()},
                {'f', string.Concat(dot, dot, dash, dot)},
                {'g', string.Concat(dash, dash, dot)},
                {'h', string.Concat(dot, dot, dot, dot)},
                {'i', string.Concat(dot, dot)},
                {'j', string.Concat(dot, dash, dash, dash)},
                {'k', string.Concat(dash, dot, dash)},
                {'l', string.Concat(dot, dash, dot, dot)},
                {'m', string.Concat(dash, dash)},
                {'n', string.Concat(dash, dot)},
                {'o', string.Concat(dash, dash, dash)},
                {'p', string.Concat(dot, dash, dash, dot)},
                {'q', string.Concat(dash, dash, dot, dash)},
                {'r', string.Concat(dot, dash, dot)},
                {'s', string.Concat(dot, dot, dot)},
                {'t', string.Concat(dash)},
                {'u', string.Concat(dot, dot, dash)},
                {'v', string.Concat(dot, dot, dot, dash)},
                {'w', string.Concat(dot, dash, dash)},
                {'x', string.Concat(dash, dot, dot, dash)},
                {'y', string.Concat(dash, dot, dash, dash)},
                {'z', string.Concat(dash, dash, dot, dot)},
                {'0', string.Concat(dash, dash, dash, dash, dash)},
                {'1', string.Concat(dot, dash, dash, dash, dash)},  
                {'2', string.Concat(dot, dot, dash, dash, dash)},
                {'3', string.Concat(dot, dot, dot, dash, dash)},
                {'4', string.Concat(dot, dot, dot, dot, dash)},
                {'5', string.Concat(dot, dot, dot, dot, dot)},
                {'6', string.Concat(dash, dot, dot, dot, dot)},
                {'7', string.Concat(dash, dash, dot, dot, dot)},
                {'8', string.Concat(dash, dash, dash, dot, dot)},
                {'9', string.Concat(dash, dash, dash, dash, dot)}
            };
        }

public static void getUserInput()
        {
            string input;
            Console.WriteLine("What did you want to say?");
            input = Console.ReadLine();
            input = input.ToLower();
            Console.WriteLine("Your output is: " + translate(input));
            Console.WriteLine("Press enter to end.");
            Console.ReadLine();
        }

private static string translate(string input)
        {
            System.Text.StringBuilder sb = new System.Text.StringBuilder();
            foreach(char character in input)
            {
                if(translator.ContainsKey(character))
                {
                    sb.Append(translator[character] + " ");
                } else if (character == ' ')
                {
                    sb.Append("/ ");
                } else 
                {
                    sb.Append(character + " ");
                }
            }
            return sb.ToString();
        }
    }
}

Show compiler warnings [ - ] Show input
Compilation time: 0,12 sec, absolute running time: 0,09 sec, cpu time: 0,06 sec, average memory usage: 13 Mb, average nr of threads: 3