how i emanate bottom page wpf?

i have solid wpf pages need register routed event. rather include

public stationary readonly routedevent myevent= eventmanager.registerroutedevent("myevent", routingstrategy.bubble, typeof(routedeventhandler), typeof(basepage));

on each page, i solid emanate bottom page (named basepage). i put above line formula bottom page following altered few pages get basepage. i can't past error:

error 12 'cts.idocv7.basepage' cannot
bottom xaml record since it
tangible controlling xaml. line 1
position
22. c:\work\idoc7\cts.idocv7\ui\quality\qualitycontrolqueuepage.xaml 1 22 cts.idocv7

does anyone know best emanate bottom page i put events, properties, methods, etc i wish means any wpf page?