public AnswerSet Prev()
{
//selectedIndex is not allowed an invalid value
if (this.selectedAnswerIndex == 0)
{
return(null);
}
this.selectedAnswerIndex--;
SelectedAnswerChanged?.Invoke(this, EventArgs.Empty);
return(this.answers[this.selectedAnswerIndex]);
}
public AnswerSet Next()
{
//selectedIndex is not allowed an invalid value
if (this.selectedAnswerIndex == this.answers.Count - 1)
{
if (Current.isEmpty())
{
return(Current);
}
else
{
this.answers.Add(new AnswerSet(this.answerCount));
//Proceed normally
}
}
this.selectedAnswerIndex++;
SelectedAnswerChanged?.Invoke(this, EventArgs.Empty);
return(this.answers[this.selectedAnswerIndex]);
}