Few months ago , I started to search about how one could program Metro Style Apps.
Metro Style Apps are new type of applications are available in Windows 8 inside Metro User Interface.
I knew that one can do that using programming language ( C# or VB.Net or C++) but a markup language called XAML is also needed. Perhaps it was the first time I heard about this new language. It is also needed if you want to program applications for Windows Phone 7 as well.
For normal desktop applications XAML is used in a technology called WPF “Windows Presentation Foundation”
Due to Wikipedia defination WPF is a computer-software graphical subsystem for rendering user interfaces in Windows-based applications.
As applied to the .NET Framework programming model, XAML simplifies creating a UI for a .NET Framework application. You can create visible UI elements in the declarative XAML markup, and then separate the UI definition from the run-time logic by using code-behind files, this code is joined to the markup through partial class definitions.
public partial class MainPage : PhoneApplicationPage
XAML directly represents the instantiation of objects in a specific set of backing types defined in assemblies.
Note : This is unlike most other markup languages, which are typically an interpreted language without such a direct tie to a backing type system.
XAML enables a workflow where separate parties can work on the UI and the logic of an application, using potentially different tools.
Using XAML we can create objects like buttons , Text boxes , Radio Buttons , ….etc
For example to create a button we can do that through this code
<Button Background="Blue" Foreground="Red" Content="This is a button"/>