One of the loving features of mine in VS 2005 is class diagrams. The ability to draw class diagrams and the same time it will generate the code for us and vice-versa. Once you done the development you can simply generate the class diagram by right clicking on the Project > View Class Diagram. If you want to export the diagram as an image, right click on the diagram and select Export Diagram as Image. Below is the sample diagram I created using VS 2005.