I'm trying to use a ListBox.DataSource = ObservableCollection, however I can't figure out how to have the listbox automatically update when my OC updates. I can hook the CollectionChanged event on the OC, however what do I need to do to the listbox to make it update?
Based on your question, it sounds like you're trying to use ObservableCollection<T> in a WinForms application.
ObservableCollection<T> is primarily used in WPF development. In WinForms, for the control be automatically updates as the collection changes your collection needs to implement IBindingList.
The easiest solution is to use BindingList<T> instead of ObservableCollection<T>. After that, your controls should update as the collection changes.
来源：https://stackoverflow.com/questions/2097447/c-sharp-listbox-observablecollectiont