Visual Studio 2010 or Visual Web Developer Express 2010 or Visual Phone Developer Express 2010 that matches the language version of Silverlight Tools 4 must be installed before installation of Silverlight Tools can continue. Silverlight Tools is available in other languages at <A HREF="http://go.microsoft.com/fwlink/?LinkId=177432">0 http://go.microsoft.com/fwlink/?LinkId=177432</A>