System.Object
   C1.Win.Collections.ObjectModel.ItemChangedEventArgs<TItem>
   C1.Win.Collections.ObjectModel.ObservableKeyValuePair<TKey,TValue>
   System.Collections.ObjectModel.Collection<T>
      System.Collections.ObjectModel.ObservableCollection<T>
         C1.Win.Collections.ObjectModel.ObservableDictionary<TKey,TValue>

C1.Win.4.5.2 アセンブリ