Always a null reference (Nothing in Visual Basic) for a UserTrackingRecord.
Assembly: System.Workflow.Runtime (in System.Workflow.Runtime.dll)
There is no event data associated with a user event, therefore, has no meaning and is always a null reference (Nothing).
The user data that is pushed to the runtime tracking infrastructure by whichever one of the TrackData or TrackData methods that caused the user event is sent in UserData. Any data extracts that are associated with the user event by the UserTrackPoint are encapsulated in TrackingDataItem objects and sent in Body.
This property is set by the runtime tracking infrastructure.