protected override void InsertItem(int index, T item)
{
if (!_suspendTracking)
{
_trackedItems.AddLast(new LinkedListNode <TrackedItem>(TrackedItem.Insert(item, index)));
}
base.InsertItem(index, item);
}
public void AddRange(IEnumerable <T> items)
{
_suspendTracking = true;
_trackedItems.AddLast(new LinkedListNode <TrackedItem>(TrackedItem.Insert(items.ToArray(), Count)));
foreach (var item in items)
{
Items.Add(item);
}
_suspendTracking = false;
}