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ToolBar.ToolBarButtonCollection.ContainsKey Method

Determines if a ToolBarButton with the specified key is contained in the collection.

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

public virtual bool ContainsKey(
	string key


Type: System.String

The name of the ToolBarButton to search for.

Return Value

Type: System.Boolean
true to indicate a ToolBarButton with the specified key is found; otherwise, false.

The Name property corresponds to the key for a ToolBarButton in the ToolBar.ToolBarButtonCollection.

The key comparison is not case-sensitive. If the key parameter is null or an empty string, Item returns false.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

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

.NET Framework

Supported in: 3.5, 3.0, 2.0