void UpdateSelectedDates(IEnumerable <DateTime> dateTimes)
{
if (dateTimes.Count() == 1)
{
this.DateSelected?.Invoke(dateTimes.ElementAt(0));
}
Item0.ControlDelegate.HighlightedDates = dateTimes;
Item1.ControlDelegate.HighlightedDates = dateTimes;
Item2.ControlDelegate.HighlightedDates = dateTimes;
Item0.Invalidate();
Item1.Invalidate();
Item2.Invalidate();
}