"Hidden" Code Gen Tool in VS2008

Did you know there was a "hidden" code-generation feature in VS2008?  Text Templating Transformation Toolkit  (aka T4) actually debuted in VS2005 Guidance Automation Toolkit, but shipped baked into VS2008.  This gives you CodeSmith-style code-generation templates that can be used in your projects to generate code from any source.  Simply add a text file with the extension ".tt", and VS will add a "Transform Templates" button to the solution explorer window. 

http://msdn.microsoft.com/en-us/library/bb126445(VS.80).aspx

http://msdn2.microsoft.com/en-us/vs2008/cc308634.aspx