I have PointsListView and PointContainer: INotifyPropertyChanged, ICollection<Point>.

public class PointContainer: INotifyPropertyChanged, ICollection<Point>
    {
        public event PropertyChangedEventHandler PropertyChanged;

        protected void OnPropertyChanged(PropertyChangedEventArgs e)
        {
            if (PropertyChanged != null)
                PropertyChanged(this, e);
        }

        public IEnumerable<Point> Points
        {
            get
            {
                return points.Values;
            }
        }

        public void Clear()
        {
            points.Clear();
            OnPropertyChanged(new PropertyChangedEventArgs("Points"));
        }

...

}

For the reliability I made a binding from code:

private void BindPointContainerToListView()
{
   Binding binding = new Binding();
   binding.Source = PointContainer;
   binding.Path = new PropertyPath("Points");
   PointsListView.SetBinding(ListView.ItemsSourceProperty, binding);
}

Why when change PointContainer is not automatically updated PointsListView.ItemsSource. PointsListView.Items.Refresh (); solves the problem, but why does not work automatically? What am I doing wrong?