For some reason, I have to run SL 4 projects. However, I receive a ton of compiling errors. Then I tried to re-install all of the SW needed for SL API project by referring to http://help.arcgis.com/en/webapi/silverlight/help/index.html#/Installation/016600000005000000/. I repaired VS 2010 and VS 2010 SP1. Then I tried to install Silverlight 4 Tools for Visual Studio but got failure. The error message is: Installation Requirements: 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">http://go.microsoft.com/fwlink/?LinkId=177432</A>. Since I did have installed VS 2010, I don't know what measure I should take next. I wish ESRI SL Team or some experienced professionals can provide some help. Thanks. By the way, got another Q here. From the API: Silverlight Version 4 is supported: Silverlight 4 Tools for Visual Studio (add-on required if using Visual Studio 2010 without SP1) Since I installed SP1, is the SL 4 Tools still required?
