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CommandManager.RemoveCanExecuteHandler Method

Detaches the specified CanExecuteRoutedEventHandler from the specified element.

Namespace:  System.Windows.Input
Assembly:  PresentationCore (in PresentationCore.dll)

public static void RemoveCanExecuteHandler(
	UIElement element,
	CanExecuteRoutedEventHandler handler


Type: System.Windows.UIElement
The element to remove handler from.
Type: System.Windows.Input.CanExecuteRoutedEventHandler
The can execute handler.


element or handler is null.

The following example detaches a CanExecuteRoutedEventHandler and an ExecutedRoutedEventHandler which had previously been attached to a Button.

CommandManager.RemoveExecutedHandler(helpButton, HelpCmdExecuted);
CommandManager.RemoveCanExecuteHandler(helpButton, HelpCmdCanExecute);

.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.