INotifyCollectionChanged Interface
Microsoft Silverlight will reach end of support after October 2021. Learn more.
Notifies listeners of dynamic changes to a collection, such as when items are added and removed, or the entire collection object is reset.
Namespace: System.Collections.Specialized
Assembly: System.Windows (in System.Windows.dll)
Syntax
'Declaration
Public Interface INotifyCollectionChanged
public interface INotifyCollectionChanged
The INotifyCollectionChanged type exposes the following members.
Events
| Name | Description | |
|---|---|---|
.gif "Public event") .gif "Supported by Silverlight for Windows Phone") |
CollectionChanged | Occurs when the items list of the collection has changed, or the collection is reset. |
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Remarks
INotifyCollectionChanged defines one member, CollectionChanged. The event data of this event (NotifyCollectionChangedEventArgs) reports information about the nature of the collection change.
To provide change notifications for bindings to ItemsControl and its subclasses, your collection must implement this interface. Before implementing your own collection class, consider using the ObservableCollection<T> class that implements INotifyCollectionChanged and INotifyPropertyChanged.
Version Information
Silverlight
Supported in: 5, 4, 3
Silverlight for Windows Phone
Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.
See Also