Now Microsoft Web platform installer can directly install the latest version of Silverlight toolkit, which is placed in the Web PI list. Microsoft also recommends that you use Microsoft Web platform installer to obtain the Silverlight toolkit.
If you haven't installed Microsoft Web platform installer, you can download the http://www.microsoft.com/web/downloads/platform.aspx from the address below
Or directly add the Silverlight toolkit to Microsoft Web platform installer.
Http://www.microsoft.com/web/gallery/install.aspx? Appid = silverlighttoolkit
Simple and quick installation experience
To download the Silverlight toolkit, you don't need to download it again at codeplex.
After you open the Web Platform installer, you can find the Silverlight toolkit in the webplatform under tools.
It takes only a few seconds to complete the installation. Then we can find the new controls provided by toolkit in blend, vs2008, and vs2010b2.
References: http://www.jeff.wilcox.name/2009/11/toolkit-webpi/