Recently I have been trying to move from Silverlight 1.1/2.0 to Silverlight 1.0. One of the things I miss is intellisense. Whilst browsing about for Silverlight debug tips I came across a good blog post by  Justin-Josef Angel. It details how to get Silverlight 1.0 intellisense by using a codeplex project. This project includes a compressed and un compressed java script file. You place these files in your project. Then include one on your html page and add a reference on your JavaScript file and bobs your uncle we have a winner.   Full instructions are available at: http://blogs.microsoft.co.il/blogs/justinangel/archive/2007/08/01/Silverlight-1.0-full-Javascript-Intellisense.aspx   the java script files are available at: http://www.codeplex.com/intellisense