More RoutedEvent objects can be registered later. This method gets a snapshot and the collection of routed events is writeable throughout an application's lifetime. The collection returned might be quite large. Even just counting the events that are part of the WPF APIs, the collection count is in the high hundreds.
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)