BaseTreeAdaptortreeToUniqueIDMap Field

System.identityHashCode() is not always unique; we have to track ourselves. That's ok, it's only for debugging, though it's expensive: we have to create a hashtable with all tree nodes in it.

protected IDictionary<Object, int> treeToUniqueIDMap

Protected treeToUniqueIDMap As IDictionary(Of Object, Integer)