This documentation is archived and is not being maintained.

Control.ControlCollection.ContainsKey Method

Note: This method is new in the .NET Framework version 2.0.

Determines whether the Control.ControlCollection contains an item with the specified key.

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

public virtual bool ContainsKey (
	string key
public boolean ContainsKey (
	String key
public function ContainsKey (
	key : String
) : boolean



The key to locate in the Control.ControlCollection.

Return Value

true if the Control.ControlCollection contains an item with the specified key; otherwise, false.

The Name property of a Control corresponds to the key for a Control in the Control.ControlCollection.

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