void SaveState()
        {
            DisplayScore displayScore = new DisplayScore();

            displayScore.Notes                = textBox1.Text;
            displayScore.ScoreState.Points    = Convert.ToInt32(Score.Text);
            displayScore.ScoreState.Questions = Convert.ToInt32(QuestionScore.Text);
            displayScore.TestState.Points     = Convert.ToInt32(MaxScore.Text);
            displayScore.TestState.Questions  = Convert.ToInt32(Questions.Text);

            string msg = JsonConvert.SerializeObject(displayScore);

            File.WriteAllText(SaveFile, msg);
        }
        void LoadState()
        {
            if (!File.Exists(SaveFile))
            {
                return;
            }
            string       msg          = File.ReadAllText(SaveFile);
            DisplayScore displayScore = JsonConvert.DeserializeObject <DisplayScore>(msg);

            textBox1.Text      = displayScore.Notes;
            Score.Text         = displayScore.ScoreState.Points.ToString();
            QuestionScore.Text = displayScore.ScoreState.Questions.ToString();
            MaxScore.Text      = displayScore.TestState.Points.ToString();
            Questions.Text     = displayScore.TestState.Questions.ToString();
        }