Assembly: PresentationFramework (in PresentationFramework.dll)
WPF data binding uses this WeakEventManager so that internal classes that update bindings can attach listeners for a UIElement.LostFocus or ContentElement.LostFocus event on an object that is the target of a binding. This supports notification for the LostFocus mode of data binding, without creating strong references to data binding targets.
Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003
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.