Gets or sets the identifier of the associated resource, or the first resource identifier if an appointment has several assigned resources.
To associate an appointment with a resource, set the appointment's ResourceId property to the resource's SourceObjectContainer.Id value. For standalone appointments, the ResourceId property is set to the ResourceItemEmpty.Id value.
Use the AppointmentItem.ResourceIds property to get a collection of associated resources.
If an appointment doesn't belong to any particular resource, the scheduler shows it for all resources when the SchedulerControl.GroupType property is set to the SchedulerGroupType.Resource or SchedulerGroupType.Date value.