public void AddFirst(T item)
{
lock (SyncRoot)
{
buffer.AddFirst(item);
CollectionChanged?.Invoke(NotifyCollectionChangedEventArgs <T> .Add(item, 0));
}
}
public void AddFirst(T item)
{
lock (SyncRoot)
{
if (capacity == buffer.Count)
{
var remItem = buffer.RemoveLast();
CollectionChanged?.Invoke(NotifyCollectionChangedEventArgs <T> .Remove(remItem, capacity - 1));
}
buffer.AddFirst(item);
CollectionChanged?.Invoke(NotifyCollectionChangedEventArgs <T> .Add(item, 0));
}
}
