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PresentationSource.RemoveSourceChangedHandler Method

Removes a handler for the SourceChanged event from the provided element.

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

public static void RemoveSourceChangedHandler(
	IInputElement e,
	SourceChangedEventHandler handler


Type: System.Windows.IInputElement
The element to remove the handler from.
Type: System.Windows.SourceChangedEventHandler
The handler implementation to remove.

Even though this is a routed event, there are special restrictions placed on this event that differ from normal routed event behavior, due to the relatively small number of elements in a typical application scenario that would concern themselves with handling this event.

  • You cannot use the UIElement or ContentElement RemoveHandler methods to remove handlers. You must use RemoveSourceChangedHandler.

  • The C# += and -= event handler syntaxes, and other language specific handler syntaxes, are not supported, because the event itself is not exposed as public. Only the PresentationSource  utility methods for adding and removing the handlers directly are supported.

.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.