I am trying to create relationship classes in a Feature Dataset. The Relationship Class created successfully, I want when I update a record in the Origin table the Destination's would be updated, but it didn't.
If you need to update records based on edits to the origin, there are several ways to do it. What it boils down is to listen to the Relationship Class events and to update accordingly. That is one way to do it. Another one is to do it as an Editor Extension.