Book excerpt: Applied WPF 4 in Context sets the standard for leveraging the latest Windows user interface technology in your business applications. Using this book, you'll learn how to implement world-class Windows Professional Foundation (WPF) solutions in a real-world line of business applications, developing the code from the ground up, and understand how to apply best development practices and related .NET products and technologies to your solutions. You will cover designing and developing the application, testing and debugging, data access, reporting, and applying styles and themes to enhance the look of the user interface—all using WPF in a very practical, eminently useful context. You'll create asynchronous and parallel code, and learn how to distribute the application's components using Windows Communication Foundation (WCF). You'll also apply the Model-View-ViewModel pattern, again in a real-world WPF application. Elegant and functional WPF applications are easier to create than ever before with Applied WPF 4 in Context.