William Penberthy is currently an application development consultant with RBA, a Microsoft 2012 Partner of the Year and has been working in software development for 25 years. He has participated in the development of more than 115 different software products and has taught multiple college and university programming and software development classes. He has specialized in the Microsoft stack for almost eight years, concentrating on ASP.NET, ASP.NET, MVC, Silverlight, and WPF. William lives in Denver, Colorado.