SDE for Visual Studio .Net is UML CASE tool that is tightly coupled with VS.NET. SDE support round-trip engineering, which automatically generates code (C#, VBK) directly from the model and reverse code back to model. It also supports textual analysis, use case modeling, class diagram and other UML diagrams. To find out more about SDE, go to the product web page http://www.visual-paradigm.com/sdevs.php