Gets a value that indicates whether this button represents a year that is not in the currently displayed decade.
Assembly: PresentationFramework (in PresentationFramework.dll)
When the DisplayMode of a calendar is Decade, it displays the year before and after the current decade. For example, a calendar that shows the decade for 2000 through 2009 also displays buttons for the years 1999 and 2010. However, the property is set to true for the buttons that represent those years.
Available since 4.0