private void btn_FinnishQuiz_Click(object sender, RoutedEventArgs e)
        {
            TimeSpan testDuration = TimeSpan.FromSeconds((SelectedQuiz.TimeToComplete * 60) - time);

            _timer.Stop();

            if (SelectedQuiz.ShowResult == true)
            {
                MessageBox.Show("Thanks for doing the Quiz your score is : " + CurrentPoints.Sum().ToString());
            }
            else
            {
                MessageBox.Show("Your teacher will get back to you with a result");
            }

            UtilityTestVerktyg.Quizzes.Remove(UtilityTestVerktyg.SelectedQuiz);
            var userGrade = new Grade
            {
                CompletionDate = DateTime.Now,
                QuizId         = SelectedQuizId,
                UserId         = LoggedInUserId,
                UserScore      = CurrentPoints.Sum(),
                UserGrade      = (CurrentPoints.Sum() > QuizLength / 2) ? "G" : "IG",
                TimeToComplete = testDuration.ToString(@"mm\:ss")
            };

            Repo.SaveUserQuizScore(userGrade);
            this.Close();
        }
        private void QuizWindowClosed(object sender, EventArgs e)
        {
            if (!Repo.DoesGradeExcist(SelectedQuizId, LoggedInUserId))
            {
                Quizzes.Remove(UtilityTestVerktyg.SelectedQuiz);

                var userGrade = new Grade
                {
                    CompletionDate = DateTime.Now,
                    QuizId         = SelectedQuizId,
                    UserId         = LoggedInUserId,
                    UserScore      = CurrentPoints.Sum(),
                    UserGrade      = (CurrentPoints.Sum() > QuizLength / 2) ? "G" : "IG"
                };
                Repo.SaveUserQuizScore(userGrade);
            }
            UtilityTestVerktyg.GetUserGrade(LoggedInUserId);
            lv_Result.ItemsSource           = UtilityTestVerktyg.UserGrades;
            UtilityTestVerktyg.SelectedQuiz = null;
        }