public void NewQuiz()
 {
     if (mvm.model.Session.Count < 10) {
         MultipleQuizWindow newWindow = new MultipleQuizWindow(mvm);
         newWindow.Show();
     }
 }
 public void StartQuiz()
 {
     MultipleQuizWindow newWindow = new MultipleQuizWindow(this);
     newWindow.Show();
 }