C# (CSharp) OnItemsAdded примеры использования

Пример #1

 private void OnItemsSourcePropertyChanged(object sender, PropertyChangedEventArgs e)
 {
     OnItemsAdded?.Invoke(this, new ItemsAddedEventArgs(ItemsSource));
 }

Пример #2

 private void OnItemsSourceCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
 {
     OnItemsAdded?.Invoke(this, new ItemsAddedEventArgs(ItemsSource));
 }