XAML Well, we've learned about the .NET environment and the C# programming language, and we've taken a quick look at some of the principles and practices that will help you make your programs efficient and resilient. Now it's time to return to the .NET Framework and get our hands dirty with one of the FCL technologies. We're going to look at Windows Presentation Foundation (WPF), one of the two .NET technologies that you can use to develop applications for the Windows desktop. Now, before you stop reading because you're not interested in Windows desktop applications,