Hi Chris Scallion,
Thank you for writing.
When you implement the IEditAppointmentDialog interface, you are responsible for adding the appointments to the Appointments collection of RadScheduler. As you have noticed, this interface has a method EditAppointmentDialog with parameters schedulerdata
object (where you should pass a RadScheduler instance) and the newly created appointment. This method is called when you pass the custom dialog to the OnAppointmentEditDialogShowing.
I hope this information will help you. We will consider updating the documentation of RadScheduler with the appropriate example.
If you have other questions, feel free to contact us.
the Telerik team
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