/// <summary> /// update the lookups with the new item /// 1. create a notifier /// 2. add to item -> notifier dictionary /// 3. add to key -> items lookup /// 4. add to item -> key dictionary /// 5. attach to notifier changed event /// </summary> void _addItemToLookups(object item) { var notifier = _selectedValuePath.CreateNotifierOn(item); _itemToNotifier.Add(item, notifier); var key = notifier.Value; _keyToItems.Add(key, item); _itemToKey.Add(item, key); notifier.Changed += Notifier_Changed; }