The CustomCalendar.CalendarExceptions Collection Editor is used for adding, removing, or modifying exceptions for the custom calendars at design time.

To Access the CustomCalendar.CalendarExceptions Collection Editor

Right-click on the C1GanttView control and select Edit Calendars from its context menu. The C1GanttView.CustomCalendars Collection Editor appears. Click Add to add a new member to the collection. In the properties pane click on the ellipsis button next to CalendarExceptions. The CustomCalendar.CalendarExceptions Collection Editor appears like the following when a member is added to the collection: