protected override void RemoveItem(int index) { DetailConfiguration detailConfig = this[index]; detailConfig.DetachFromContainingCollection(); DetailVisibilityChangedEventManager.RemoveListener(detailConfig, this); base.RemoveItem(index); }
protected override void ClearItems() { foreach (DetailConfiguration detailConfig in this) { detailConfig.DetachFromContainingCollection(); DetailVisibilityChangedEventManager.RemoveListener(detailConfig, this); } base.ClearItems(); }