The S.O.L.I.D. principles are the five commandments of software development. They surpass frameworks and patterns and are the basis of good software. S.O.L.I.D. is the basis of maintainable code. This session describes and illustrates each of the principles, helping attendees learn what they are and how they can benefit you. If you are already a believer, this session will help illustrate ways you can implement S.O.L.I.D. If you wonder what S.O.L.I.D. is, this session will explain.