To export a class diagram that you created from code in a project, save the diagram as an image. If you want to export UML class diagrams instead, see Export diagrams as images. Open your class ...

Very simply generate Class Diagram from code; intuitively and rapidly, no compile, no reflection, just need a internet connect; If you are sadly facing some of old (or ugly) code, it can help to ...

Then save the diagram and copy both of the diagram files to <documents>\Visual Studio 2010\Architecture Tools\Custom Toolbox Items. You'll probably need to create both in the directory. Close and ...