Silverlight is new kross-platformennaya technology of presentation of information in the Internet, positioned as an alternative of Adobe Flash. She allows to create the saturated, by sight attractive web pages, workings in different browsers, devices and desktop operating systems. By the key to possibilities of Silverlight, as well as to all technology of presentation of WPF (Windows Presentation Foundation) of platform of Microsoft .NET Framework 3.0, there is XAML (eXtensible Application Markup Language, extensible language of razmetki of appendixes).