protected abstract string GetInvokationResult(object sender, TimerFinishedEventArgs e);
protected override string GetInvokationResult(object sender, TimerFinishedEventArgs e)
=> $"{nameof(SecondTimeObserver)}'s timer is up at: {e.InvokationTime:T}";
private void InvokeAction(object sender, TimerFinishedEventArgs e)
{
Console.WriteLine($"{GetType().Name}: ended up at {DateTime.Now:T}");
_triggerResults.Add(GetInvokationResult(sender, e));
}
