Answer
Here is the quick summary:
1. X-Browser compatibility.
2. Strongly typed
3. One development environment for client and server (C#, VB.NET)
4. Rich set of UI controls
5. Rich set of APIs (IIS Smooth Streaming, Deep Zoom)
6. Good mobile story
More information is here:
Why Silverlight is right for you
Here is the quick summary:
1. X-Browser compatibility.
2. Strongly typed
3. One development environment for client and server (C#, VB.NET)
4. Rich set of UI controls
5. Rich set of APIs (IIS Smooth Streaming, Deep Zoom)
6. Good mobile story
More information is here:
Why Silverlight is right for you