.Net Event on Collection Update

Is there a collection class of 开发者_如何转开发type IList or IEnumerable that has a flag I can check or event that can be triggered if the collection changes either by add, remove or update?

You're looking for ObservableCollection<T>. It implements INotifyCollectionChanged so you can implement that yourself or use/subclass ObservableCollection<T>.

Yes : ObservableCollection<T>.

Actually, it implements the INotifyCollectionChanged interface that defines the CollectionChanged event (that means you can add the logic to any of your class if ObservableCollection<T> is not applicable.

There is an ObservableCollection<T> class in .Net 3.0-4.0 that exposes a CollectionChanged event which would work for what you want.