Silverlight

Silverlight is a program that provides a graphics system similar to the Windows Presentation Foundation and combines multimedia, graphics, animation, and interactivity in a single software platform. It was designed to work with XAML and with .NET languages. XAML is used to mark up pages that use vector graphics and animation. The text contained in Silverlight applications is inaccessible to search engines because it is not compiled, but is available as XAML. Silverlight can also be used to create widgets for the Windows Sidebar in Windows Vista.

Silverlight can play WMV, WMA and MP3 for all supported browsers without requiring additional components such as Windows Media Player. Since Windows Media Video 9 is an implementation of the SMPTE VC-1 standard, Silverlight supports VC-1 video, only inside the ASF container. In addition, the license agreement says that VC-1 is only allowed for personal and non-commercial use by a consumer ("personal and non-commercial use of a consumer").

Silverlight allows you to dynamically load XML and use the DOM to interact with it, just like Ajax does. Silverlight includes a Downloader object thanks to which you can download scripts, media files, etc. if the application needs it. Since version 2.0, the program logic can be described in any of the .NET languages including dynamic programming languages such as Iron Ruby and Iron Python which execute in the DLR (Dynamic Language Runtime) and not the CLR (Common Language Runtime).