In the November 2009 release of Silverlight Toolkit, the Silverlight Unit Test Framework is included not only the libraries but also the project template. The Silverlight Unit Test Framework project is originally hosted here.
You can download the November 2009 release of Silverlight Toolkit here.
I use Visual Studio 2008 and Silverlight 3. After installation of Silverlight Toolkit, I found that it’s installed in the “Program Files” under Visual Studio 10.0 folder.
No need to worry, when I run the Visual Studio 2008 and add new project, I can see the Silverlight Unit Test Application is now added to the Project Template.
If you need the libraries, you can find them inside the %Program Files%\Microsoft SDKs\Silverlight\v3.0\Toolkit\Nov09\Bin folder.
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Silverlight
silverlight, silverlight 3, silverlight toolkit, unit test