I have nHibernate-generated classes functioning as the BO for an MVC project persisting to a SQL db. I'd like to render the existing code into UML diagrams so I can start playing around with code gen utilities.
Similar to what's asked here only for SQL/nhibernate - SO suggests Tools for generating UML class diagram from C# source or dll and that's really very close - except the last answer there is all of 2 years old. Surely the body of knowledge has expanded since.
No tool is required:
I'm assuming you're using Visual Studio 2010.