Using Bing Maps problem

[BrianBorg]

I want to use bong maps in the api. I have followed the online example but I am getting this error

TileLayer' was not found because 'clr-namespace:ESRI.ArcGIS.Client.Bing;assembly=ESRI.ArcGIS.Client.Bing' is an unknown namespace.

The dll is referenced correctly and the application does compile.

[AliMirzabeigi]

Which version of Silverlight and ESRI API you're using?

[BrianBorg]

I am using v2.0

To solve the problem I had to add this line

ESRI.ArcGIS.Client.Geometry.MapPoint webmercatorP = ESRI.ArcGIS.Client.Bing.Transform.GeographicToWebMercator(new ESRI.ArcGIS.Client.Geometry.MapPoint(0, 0));

But it doesn't make any sense. With this line the solution works fine