dossiers Dictionary

using System;
using System.IO;
using System.Collections.Generic;

namespace ConsoleApp3
{
    internal class Program
    {
        static void Main(string[] args)
        {
            Dictionary<string, string> dossiers = new Dictionary<string, string>();
            bool isRun = true;
            string userInput;

            while (isRun)
            {
                userInput = Console.ReadLine();

                switch (userInput)
                {
                    case "1":
                        dossiers.Add(Console.ReadLine(), Console.ReadLine());
                        break;
                    case "2":
                        string tempKey = Console.ReadLine();
                        if (dossiers.ContainsKey(tempKey))
                        {
                            dossiers.Remove(tempKey);
                        }
                        else
                        {
                            Console.WriteLine("Досье не найденно");
                        }
                        break;
                    case "3":
                        if (dossiers.Count > 0)
                        {
                            foreach (var elemnt in dossiers)
                            {
                                Console.WriteLine($"{elemnt.Key} - {elemnt.Value}");
                            }
                        }
                        else
                        {
                            Console.WriteLine("Список досье пуст.");
                        }
                        break;
                    case "4":
                        isRun = false;
                        break;
                }
            }
        }
    }
}