Answer :: 1.Click on Start button
2 Go to programms
3. Go to vs 2008
4 .Open the file
New --> New Project
5. see left templates Then select Silverlight
6. Right display Silverlight applications
7. Your select Usercontrol OR Business applications
8. after click ok
9. Then display Silverlight Project

Silverlight supports Windows Media Audio and Video (WMA, WMV7-9) and VC-1, as well as MP3 audio.

A basic xap file in silverlight will have an assembly related to specific code for the application, an
application manifest file and any additional assemblies need to run the application. At a minimum, two files are
needed, the application manifest file and the application assembly. For example:
AppManifest.xaml
MyPianoV2.dll
Once you have created the .xap file, the Silverlight 2 or 3 plug-in downloads the file and runs it in a separate
work space.

A basic xap file in silverlight will have an assembly related to specific code for the application, an
application manifest file and any additional assemblies need to run the application. At a minimum, two files are
needed, the application manifest file and the application assembly. For example:
AppManifest.xaml
MyPianoV2.dll
Once you have created the .xap file, the Silverlight 2 or 3 plug-in downloads the file and runs it in a separate
work space.

Nothing, Silverlight 2 is a full superset of Silverlight 1.0 - it is 100% compatible with Silverlight 1.0
applications and provides significantly more powerful features and functionality. Silverlight 1.0 applications even
benefit from improvements in media playback and performance characteristics of Silverlight 2 with no additional
work.

?? Presentation Layer
? Silverlight Controls
? Silverlight Toolkit
?? Business Logic Layer
? ASMX Web Services
? WCF
? WCF RIA Services
?? Data Access Layer
? ADO.NET, Entity Framework
? LINQ to SQL
? ADO.NET Data Services
?? Data Storage Layer
? SQL Server
? Oracle
? MySQL
? DB2

??Presentation Tier

?? Business Logic Tier

?? Data Tier

* Silverlight offers cross-domain support for applications
* Silverlight plugin is just a 1MB download and is supported in windows XP and above.
* Silverlight also has a browser plugin but still needs to reach at pace with flash.
* supports asynchronous calls

Support of .NET framework - if you are already .NET developer it is easy to start programming on Silverlight.
Support of Managed code - you can write programming in your favorite language which .NET CLR supports like C#,VB.NET, Dynamic languages(IronPython, IronRuby).
Better development tools -Visual Studio 2010, Expression Blend.
Large community- available lot of learning resource as compare to Flash technology.
Integration with Enterprise based technologies like WPF, LINQ etc...

Yes. Silverlight together with Windows Media Services enable live streaming experiences.