public QuizManagerController()
 {
     if (_quizRepo == null)
     {
         _quizRepo = new QuizRepositoryInMemory();
         _quizRepo.LoadSampleQuestions();
     }
 }
        static void Main(string[] args)
        {
            //I assembled my testing gear
            QuizRepositoryInMemory quizRepo = new QuizRepositoryInMemory();


            quizRepo.AddQuestion(new QuizQuestion
            {
                Id       = 0,
                Category = "Test",
                Content  = "Select your favorite color",
                Answers  = new List <Answer>
                {
                    new QuizAnswer
                    {
                        Id        = 0,
                        Content   = "Blue",
                        IsCorrect = false
                    }
                }
            });

            quizRepo.AddQuestion(new QuizQuestion
            {
                Id       = 1,
                Category = "Test",
                Content  = "Select your favorite number",
                Answers  = new List <QuizAnswer>
                {
                    new QuizAnswer
                    {
                        Id        = 0,
                        Content   = "Blue",
                        IsCorrect = false
                    }
                }
            });
            //I acted to test the method ; called the method
            var resultList = quizRepo.GetQuestions(10);

            if (resultList.Count <= 10)
            {
                Console.WriteLine("Test 1 Passed");
            }
            else
            {
                Console.WriteLine("Test 1 Failed");
            }

            var testQuestion = quizRepo.GetQuestionById(1);

            if (testQuestion.Content == "Select your favorite number")
            {
                Console.WriteLine("Test 2 Passed");
            }
            else
            {
                Console.WriteLine("Test 2 Failed");
            }


            var singleQuestion = quizRepo.GetQuestion();

            if (!string.IsNullOrWhiteSpace(singleQuestion.Content))
            {
                Console.WriteLine("Test 3 Passed");
            }
            else
            {
                Console.WriteLine("Test 3 Failed");
            }
        }