Hi Mike,

Thanks for an answer.
Unfortunatelly, it is quite huge project and it is hard to get some peases of data and make a test app.

I followed an article above.
Here is a piece of my code of binding

                CalendarInfo.DataBindingsForAppointments.BindingContext = new BindingContext();

                CalendarInfo.DataBindingsForAppointments.SubjectMember = "Subject";
                CalendarInfo.DataBindingsForAppointments.DescriptionMember = "Description";
                CalendarInfo.DataBindingsForAppointments.StartDateTimeMember = "StartDateTime";
                CalendarInfo.DataBindingsForAppointments.EndDateTimeMember = "EndDateTime";
                CalendarInfo.DataBindingsForAppointments.AllDayEventMember = "AllDayEvent";

                CalendarInfo.DataBindingsForAppointments.OwnerKeyMember = "OwnerKey";
                CalendarInfo.DataBindingsForAppointments.DataKeyMember = "DataKey";

                //Properties when using recurring appointments.
                CalendarInfo.DataBindingsForAppointments.RecurrenceIdMember = "RecurrenceID";
                CalendarInfo.DataBindingsForAppointments.RecurrenceMember = "RecurrenceObject";
                CalendarInfo.DataBindingsForAppointments.OriginalStartDateTimeMember = "OriginalStartDateTime";

                // All other properties
                //CalendarInfo.DataBindingsForAppointments.AllPropertiesMember = "AllProperties";

                CalendarInfo.DataBindingsForAppointments.SetDataBinding(EventAppointments, string.Empty);

Where the EventAppointments is a BindingList of my objects.

I make following:

1. After set the recurrency settings for an event I save the Recurrence object.
2. After changing some occurence in series I save this occurence separately with the ID of Recurrence object and the origin start date.

After loading the collection is filled properly. The changed event is shown as variance in the series, but values of properties like Subject or Description, and also a DataKey on the created appointment is reverted to values from the Root record.

This occurs right during adding an object to the source collection and creation an appointment.

Is it required to store AllProperties for events?
Looks like I could make a trick and assign back valid values of appointment after creation, but it would be better to understand what is wrong.

Please let me know if you have any suggestion.

Hi Mike,

I don't store AllProperties data for my events.

Is there a chance to work without having this?

Ok, I'll try to create a simple sample closer to weekends.

Hi Igor,

It's required to use AllProperties to get this working. What happens when you comment that line back in?

If it still doesn't work, we'll need a sample to debug what's causing the issue.