If you've added mapping functionality to your Silverlight application, plotted some points of interest on your map, but aren't quite satisfied with the format of the pop-up for your points, I'll show you a technique that will get you started on formatting those Tooltips to whatever your design requires.
If you are new to Telerik's RadMap component for Silverlight, I suggest you review this very informative post from the Telerik Forums to get your first map to display:
http://www.telerik.com/help/silverlight/map-create-basic-application-bing-maps.html
Assuming you have a Silverlight application that shows an empty map, let's start by creating a custom class ...