How to cancel an calendar event using ics files?

Question

One of our requirements is to create iCalendar files (.ics) and send them each in emails as an attachment. We are using DDay.Ical.dll to create ics files as under:

Answer 1

I had the issue when i sent mail containing ics file for delete event but in outlook it show me not supported format then i figured out somewhere on net and i found that i just need to change METHOD: CANCEL to MEHTHOD: REQUEST

when i import this in outlook