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Control.ControlCollection.ContainsKey Method

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

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)
abstract ContainsKey : 
        key:string -> bool  
override ContainsKey : 
        key:string -> bool


Type: System.String

The key to locate in the Control.ControlCollection.

Return Value

Type: System.Boolean
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.

.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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