Requests when used in combination with R3

[TORISOUP]

I have two requests.

1. readonly-observable-Dictionary

The IReadonlyReactiveDictionary that existed in UniRx was easy to use, so we request a function equivalent to it. If I tried to handle the current ObservableDictionary Readonly, I would have to divide it into two parts, IReadonlyDictionary and IObservableCollection<KeyValuePair>, which is not easy to handle.

2. Publish OnCompleteMessage from IObservableCollection.

When dealing with IObservableCollection in R3, I feel uncomfortable that it is not possible to unsubscribe from the collection side. For example, could it be possible to make IObservableCollection inherit IDisposable and issue OnCompleted on Dispose()?