d40b7087f4
main problem was that it was duplicating the _pvalue value when it shouldn't have. The real fix is that the Values property solves all these problems with it's setter but that wasn't being used by the DeepClone engine because that explicitly looks for certain collection types and IReadOnlyCollection wasn't one of them. With that included and PropertyValue marked as IDeepCloneable, it all just works. I've added tests.