NotifyCollectionChangedEventArgs.NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction, Object, Int32) Constructor

Initializes a new instance of the NotifyCollectionChangedEventArgs class that describes a one-item change.

Namespace: System.Collections.Specialized
Assembly: WindowsBase (in windowsbase.dll)

Public Sub New ( _
	action As NotifyCollectionChangedAction, _
	changedItem As Object, _
	index As Integer _
Dim action As NotifyCollectionChangedAction
Dim changedItem As Object
Dim index As Integer

Dim instance As New NotifyCollectionChangedEventArgs(action, changedItem, index)
public NotifyCollectionChangedEventArgs (
	NotifyCollectionChangedAction action, 
	Object changedItem, 
	int index
public function NotifyCollectionChangedEventArgs (
	action : NotifyCollectionChangedAction, 
	changedItem : Object, 
	index : int
You cannot use constructors in XAML.



The action that caused the event. This can be set to Reset, Add, or Remove.


The item that is affected by the change.


The index where the change occurred.

Exception typeCondition


If action is not Reset, Add, or Remove, or if action is Reset and either changedItems is not null or index is not -1.

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0

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