What is "xaml"
XAML or Extensible Application Markup Language, is a declarative markup language for application programming (a way to represent graphical objects in .Net through XML). Its main use is for the definition of user interfaces in WPF (Windows Presentation Foundation), Silverlight, Windows Phone and Windows 8 Store; the latter two use the principles of Microsoft Design Language (formerly known as Metro or Modern UI), although it can also be used for other applications, notably workflows WF (Windows Workflow Foundation).