// An activity was added to a day.
private void OnActivityAddedToDay(object sender, Activity activity)
{
var dayControl = sender as DayControl;
if (dayControl == null)
{
return;
}
var day = dayControl.Day;
if (day == null)
{
return;
}
_mainViewModel.AddActivityToDay(day, activity);
Calendar.Days = null;
Calendar.Days = _mainViewModel.Days;
}