public async void SaveQuiz()
{
QuizToEdit.Quistions = QuistionCollection.ToList();
await PersistencyFacade.SaveQuizzesAsJsonAsync(QuizManager.Instance.Quizzes);
MainViewModel.Instance.NavigateBack();
}
//Actions
public void AddQuistion()
{
QuistionCollection.Add(_editedQuistion);
_editedQuistion = new Quistion();
SelectedIndex = QuistionCollection.Count - 1;
OnPropertyChanged(nameof(QuistionCollection));
}
public void DeleteQuistion()
{
QuistionCollection.RemoveAt(SelectedIndex);
OnPropertyChanged(nameof(QuistionCollection));
}