title: I don't have SqlServerCe assembly?
body: <p>I'm working on a simple WinForms app that uses an .sdf database to store data.  I saw <a href="http://matthewmanela.com/blog/sql-ce-3-5-with-linq-to-sql-revisited/">this</a> interesting post on how to handle multithreaded access, which seemed useful.  Problem is, I can't find the System.Data.SqlServerCe assembly.  I installed the Sql Server Compact 3.5 SDK, but that reference still doesn't show up in my .NET assemblies list when I go to add the reference.  What am I missing?</p>
  
  <p>I'm using Visual Studio 2010 Ultimate on Windows 7.</p>