There are several map view modes on Silverlight Bing Maps as 2D projection of the Earth. Road, Aerial or AerialWithLabels modes.

In Road mode we are only able to see roads, street names and places, there is no landform on the map. 

We can define Map Road Mode in XAML code with "Mode" Property

<Microsoft_Maps_MapControl:Map Mode="Road" x:Name="MapIK" Center="41,29" ZoomLevel="10"/>

or define dynamicly in C#

MapIK.Mode = new RoadMode();


All the best