public YesNoQuestion OnYes(NextQuestion onYes) { _onYes = onYes; return this; }
public YesNoQuestion OnNo(NextQuestion onNo) { _onNo = onNo; return this; }
public DateTimeQuestion OnNext(NextQuestion onNext) { _onNext = onNext; return this; }
public YesNoQuestion() { _onNo = Done; _onYes = Done; }
public DateTimeQuestion() { _onNext = Done; }