WPF: What is the right base class for collections used in data binding?

Question

I am building an object model with strongly typed collection classes (e.g. CustomerCollection). I want to support full two-way binding on both the collection itself and all of the data models in the collection.

For the models it seems like INotifyPropertyChanged is the right way to wire up the models. But what inferface/base class should I use so that WPF knows when my collection's contents change?

Answer 1

ObservableCollection<T> - designed specifically for WPF binding.

Answer 2

I would recommend typing your properties that you expose as IList, or IEnumerable (generic or not, your choice), rather than ObservableCollection since it ties you into that implementation, and there are a number of situations that this becomes annoying.

The specific interface you need your collections to implement is INotifyCollectionChanged.