I have an ObservableCollection that currently only has one ResourceType in it: Provider. I have 3 Providers in that ResourceType. I have a collection of Appointments that I have attached to the AppointmentSource. When I did not have any ResourceType attached the appointments would appear in the scheduler just fine. I have added the ResourceType and they are displaying correctly, but the appointments are not showing. My collection of appointments is correctly populating still. I have tried attaching the specific Provider I need to the Appointment's Resource, but I still cannot get them to show. I am lost and would love any help that could be given.