What is Silverlight?Silverlight is a cross-browser,
cross-platform plug-in for delivering the next generation of .NET based media
experiences and rich interactive applications for the Web. Silverlight offers a
flexible programming model that supports AJAX,
VB, C#, Python, and Ruby, and integrates with existing
Web applications.
Silverlight supports fast, cost-effective
delivery of high-quality video to all major browsers running on the Mac OS or Windows.
Wikipedia says "Silverlight
is a proprietary runtime for browser-based Rich Internet Applications,
providing a subset of the animation, vector graphics, and video playback
capabilities of Windows Presentation Foundation."
NoteSilverlight is built over AJAX technonolgy.
So,
It will be better to have a look first over the AJAX and how it works
HTH