This documentation is archived and is not being maintained.

NotifyCollectionChangedEventArgs Constructor (NotifyCollectionChangedAction, IList, Int32)

Initializes a new instance of the NotifyCollectionChangedEventArgs class that describes a multi-item change or a Reset change.

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

public NotifyCollectionChangedEventArgs(
	NotifyCollectionChangedAction action,
	IList changedItems,
	int startingIndex


Type: System.Collections.Specialized.NotifyCollectionChangedAction
The action that caused the event. This can be set to Reset, Add, or Remove.
Type: System.Collections.IList
The items affected by the change.
Type: System.Int32
The index where the change occurred.


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


If action is Add or Remove and changedItems is null.

.NET Framework

Supported in: 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.