Silverlight Framework
From Richard's Wiki
Silverlight Framework Desirable Features
- Supports Themes
- Supports publish/subscribe model for component events - use HTML DOM for events between Silverlight components
- Effects Library
- Silverlight 4 supports a subset of the new Managed Extensibility Framework in .NET 4. MEF enables you to customize a Silverlight app or add functionality incrementally even after it has been deployed, to satisfy third-party or customer requests. The framework is designed to support composite apps.