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ListBox.SelectedObjectCollection.Contains Method

Determines whether the specified item is located within the collection.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in

public bool Contains (
	Object selectedObject
public final boolean Contains (
	Object selectedObject
public final function Contains (
	selectedObject : Object
) : boolean



An object representing the item to locate in the collection.

Return Value

true if the specified item is located in the collection; otherwise, false.

The Contains method enables you to determine whether an item from the ListBox.ObjectCollection class is a member of the selected items stored in the ListBox.SelectedObjectCollection. You can use this to determine if a specific item in a multiple-selection ListBox is selected.

Windows 98, Windows 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 .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0