As you might already know, starting Q3 2011 SP1 Telerik distribute Silverlight 5 assemblies as a hotfix
RadControls for Silverlight 5 are fully supported in terms of Telerik Silverlight projects in Visual Studio too. The Silverlight5 binaries still aren't distributed through the automatic download of the VSExtensions though, for we want to stabilize all the workflow some more.
We are working on having this complete for the R1 2011 release.
In the meantime, to jump-start using the RadControls for Silverlight5 binaries inside your IDE, the task is as easy as:
- Download the hotfix zip to a preferred location on your machine
- Extract the archive to its own folder under %appdata%\Telerik\Updates
- Start Visual Studio and create a new Silverlight 5 project.
Merry Christmas and a Happy New Year!