ObservableSortedDictionary<TKey, TValue>

[adimosh]

A new class named ObservableSortedDictionary<TKey, TValue> should be implemented.

The class should mimic the behaviour of SortedDictionary<TKey, TValue>, but also advertise all its changes.

Unlike ObservableDictionary<TKey, TValue>, this class should point out indexes as well when the INotifyCollectionChanged interface implementation is used.