Since few weeks ago it is possible to watch sessions from .NET DeveloperDays 2016 on YouTube channel. I think that the best speaker of that conference edition was Ted Neward. I recommend his closing keynote session. It was really great. It is hard to say that this session was technical one. I would rather say that it was more philosophical. During it Ted showed importance of context in scope of taking correct decisions. He provided a lot examples that showed difficultness of taking this one correct solution / decision. It is hard to describe it. I recommend you to watch it.