For our product we are using Telerik RadScheduler to display user calendar information, which we make extensive use of the Telerik.Web.UI.RecurrenceRule implementation.
Additionally we are now integrating with Google Calendar to display and edit external events within our application.
There have been several recurrence rules returned from Google that follow the iCalendar standard but RecurrenceRule has failed to parse correctly. Below are some examples of rules that have issues:
1. EXDATE value is ignored:
2. INTERVAL is ignored (interval of 1 is assigned when parsed by Telerik)
3. Parse fails completely: