To do this you need to get the appointment, whose occurrence you need to delete. Then, you have to delete the time when this occurrence appears.
The code below demonstrates the above approach:
I hope this information helps. I will be glad to assist you further.
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items