Beginning C# Object-Oriented Programming (Expert's Voice in C#) About the Author Dan Clark is a senior business intelligence (BI)/programming consultant specializing in Microsoft technologies. He is focused on learning new BI/data technologies and on training others how to best implement the technology. Dan has published several books and numerous articles on .NET programming and BI development. He is a regular speaker at various developer/database conferences and user group meetings and enjoys interacting with the Microsoft developer and database communities. In a previous life, he was a physics teacher; he is still inspired by the wonder and awe of studying the universe and figuring out why things behave the way they do.