This book shows you how to control the power to produce clean, tested, maintained code. Now recognized that every non-trivial WPF or Silverlight applications need to be designed around the pattern (MVVM) design of the Model-View-ViewModel in order to unlock the full potential of data-binding technology. However, knowledge about how to do this is missing from most of the development community and even in between? Those who work with WPF and Silverlight every day. Pro WPF and Silverlight MVVM will show you how to organize your application so that it can grow as much as needed in any direction without danger of collapse. Apply WPF and Silverlight? Powerful data-binding model correctly. Examine how to organize applicationtargeting WPF or Silverlight, including unit-testing, source-control, separation of concerns, data serialization, and how to tie everything together with MVVM. Who this book is to Developers who want to learn how to architect WPF or Silverlight applications to ensure maintainability, testability, and separation of concerns.