private void OnSchedulePartitionContentChanged(object sender, PartitionContentChangedEventArgs e)
 {
     SetDefaultDataSource();
     foreach (var calendarSection in Sections.OfType <DataLinkedCalendarSection>().ToList())
     {
         calendarSection.UpdateNotesCollection();
     }
 }
        protected virtual void OnPartitionContentChanged(PartitionContentChangedEventArgs e)
        {
            var handler = PartitionContentChanged;

            handler?.Invoke(this, e);
        }