Are you still waiting for Microsoft to release Silverlight 4 for Visual Studio 2010 RC?

I'm not anymore :)

You could completely use Silverlight 4 bits for VS 2010 Beta 2 with VS 2010 RC. Alex Sorokoletov has found how to install Silverlight 4 on VS 2010 RC.

There is no magic and steps are simple as One, Two, Tree:

1. Download Silverlight 4 Tools For VS 2010 Beta 2
2. Run installation. The dialog window saying what Visual Studio 2010 Beta 2 should be installed will appear. Don’t hit the cancel button!
3. Locate folder named like ‘bfb0032a835647b79718f26ba81d3392’ on root of some of your hard drives. And copy it’s content to some other location.
4. Open ParameterInfo.xml and comment out <BlockIf DisplayText="Visual Studio 2010 Beta 2 ..."> section (it is placed on lines 13-41)
5. Now you are ready to SPInstaller.exe to install Silverlight 4 Tools
6. One additional step is required to force Visual Studio to use Silverlight 4 instead of Silverlight 3 for visual designers. To do it open regedit and search for DesignerPlatforms. Under this key go to Silverlight and change SilverlightHost value to ‘4.0’.

You should be happy now :)

If you need RIA services then load patched Microsoft.RiaServices.Tools.dll assembly and copy it to ‘c:\Program Files\Microsoft SDKs\RIA Services\v1.0\Libraries\Server’ folder.

And then open GAC management console by [Win+R] -> assembly ->[Enter]. Remove old one assembly and add new one.

Restart Visual Studio and you are done.

Thanks for Alex!