public CovariantCollectionAdapterWithAddNotifications(
ICollection <TDerived> source,
ItemAddedEventHandler addedEventHandler,
AddingItemEventHandler addingEventHandler)
: base(source)
{
if (addingEventHandler != null)
{
AddingItem += addingEventHandler;
// Fire events for existing source items, removing them as necessary
source
.Where(x => !ShouldIncludeItem(x))
.ToList()
.ForEach(x => source.Remove(x));
}
if (addedEventHandler != null)
{
ItemAdded += addedEventHandler;
// Fire events for existing source items
foreach (var item in source)
{
OnItemAdded(item);
}
}
}
