internal ListChangedEventArgs(T item, ListItemChange change)
{
var value = item == null?Enumerable.Empty <T>() : new[] { item };
if (change == ListItemChange.Added)
{
this.AddedItems = value;
}
else if (change == ListItemChange.Removed)
{
this.RemovedItems = value;
}
}
private void OnListChangedInternal(T item, ListItemChange change)
{
if (!enabled)
{
return;
}
if (change == ListItemChange.Added)// && !addedItems.Contains(item))
{
addedItems.Add(item);
}
else if (change == ListItemChange.Removed)// && !removedItems.Contains(item))
{
removedItems.Add(item);
}
ListChanged?.Invoke(this, new ListChangedEventArgs <T>(item, change));
}
