The following message was written by Scott Guthrie at Microsoft, “The LINQ to SQL Debug Visualizer isn’t built—in to VS 2008—instead it is an add-in that you need to download to use. You can download a copy of it here.”

As of this writing, the archive to download is here:

http://www.scottgu.com/blogposts/
    linqquery/SqlServerQueryVisualizer.zip

For more information, see:

http://weblogs.asp.net/scottgu/archive/2007/
    07/31/linq-to-sql-debug-visualizer.aspx