public void ValidateAnagramWithoutLinq(string s, string t, bool isValid)
        {
            var validator = new AnagramValidator();
            var result    = validator.IsAnagramWithoutLinq(s, t);

            Assert.Equal(isValid, result);
        }
        static void Main()
        {
            IConfigurationBuilder builder = new ConfigurationBuilder()
                                            .SetBasePath(Directory.GetCurrentDirectory())
                                            .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)
                                            .AddEnvironmentVariables();

            IConfigurationRoot configuration = builder.Build();
            AppSettings        appSettings   = new AppSettings();

            configuration.GetSection("MyConfig").Bind(appSettings);
            IOptions <AppSettings> options = Options.Create <AppSettings>(appSettings);


            IEntryRepository  entryRepository = new EntryRepository(options);
            List <EntryModel> sortedList      = entryRepository.LoadEntries();

            ConsoleUI consoleUI = new ConsoleUI();

            DateTime[] dates = consoleUI.Initialize();

            IIntersectionFinder intersectionFinder = new IntersectionFinder(sortedList);

            //returns null if no entries intersect
            int[] intersectedIndexes = intersectionFinder.FindEntries(dates[0], dates[1]);

            if (intersectedIndexes != null)
            {
                IAnagramValidator anagramValidator = new AnagramValidator(sortedList);
                List <int>        anagramsIndexes  = anagramValidator.Validate(intersectedIndexes[0], intersectedIndexes[1]);

                IPalindromeRepository palindromeRepository = new PalindromeRepository(options, sortedList);
                palindromeRepository.WriteEntries(anagramsIndexes);
            }
        }