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LostFocusEventManager.RemoveHandler Method

.NET Framework 4.5

Removes the specified event handler from the specified source.

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

public static void RemoveHandler(
	DependencyObject source,
	EventHandler<RoutedEventArgs> handler


Type: System.Windows.DependencyObject

The source object that the raises the UIElement.LostFocus or ContentElement.LostFocus event.

Type: System.EventHandler<RoutedEventArgs>

The delegate that handles the UIElement.LostFocus or ContentElement.LostFocus event.


handler is null.

.NET Framework

Supported in: 4.6, 4.5

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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