Is there any reason why this event shouldn't be marked as
[field:NonSerialized]
[field:NotUndoable]
?
I had a handler attached to this event on my ViewModel and it took a while to figure out why I was getting a serialization exception on save when it was trying to serialize the viewmodel.
I'm now attaching to the CollectionChanged event, and everything is working fine now.
Yes, that looks like a bug. I'll add it to the list for 4.1.
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