/// <summary>Releases all used resources and deregisters all events on the items and the underlying collection. </summary>
public void Dispose()
{
TrackCollectionChanges = false;
TrackItemChanges = false;
_internalCollection = null;
Items = null;
}
private void UpdateTopItems()
{
if (_updateLock)
{
return;
}
var collection = TopItemsCount == -1 ? this : this.Take(TopItemsCount);
if (TopItems == null)
{
TopItems = new MtObservableCollection <T>(collection);
}
else
{
TopItems.Initialize(collection);
}
}