Gets a value that indicates whether the Width component of the size changed.
Assembly: PresentationFramework (in PresentationFramework.dll)
The layout system occasionally experiences this state due to minor fluctuations in the input parameters; however, the overall rendered scene is considered to be the same; therefore, no visible changes are detected. The handler for the SizeChanged event should check for this state in order to avoid invalidation of layout if the dimension didn't actually change.
Available since 3.0