• Difference between silverlight 1.0 and 2.0:
  Silverlight 1.0 (Features):
• Cross-Browser Support for Firefox, IE, Safari
• Cross-Platform Support for Windows and Mac (and Linux through the Moonlight Project)
• 2D Vector Animation/Graphics
• AJAX Support
• HTML DOM Integration
• HTTP Networking
• Canvas Layout Support
• JavaScript Support
• Silverlight ASP.NET Controls (asp:media, asp:xaml)
• XAML Parser (based on WPF)
• Media – 720P High Definition (HD) Video
• Media – Audio/Video Support (VC-1, WMV, WMA, MP3)
• Media – Image Support (JPG, PNG)
• Media Markers
• Windows Media Server Support
  Silverlight 2.0 (features):
• Cross-Browser Support for Firefox, IE, Safari
• Cross-Platform Support for Windows and Mac (and Linux through the Moonlight Project)
• 2D Vector Animation/Graphics
• AJAX Support
• HTML DOM Integration
• HTTP Networking
• Canvas Layout Support
• JavaScript Support
• Silverlight ASP.NET Controls (asp:media, asp:xaml)
• XAML Parser (based on WPF)
• Media – 720P High Definition (HD) Video
• Media – Audio/Video Support (VC-1, WMV, WMA, MP3)
• Media – Image Support (JPG, PNG)
• Media Markers
• Windows Media Server Support
• Support for Visual Basic.NET and C#; Common Language Runtime (CLR) based languages
• Support for IronPython, IronRuby, Managed JScript, and other Dynamic Language Runtime (DLR) based languages
• Rich Core Framework (e.g. Generics, collections)
• Multi-Threading
• Layout controls including StackPanel and Grid
• Full suite of Controls (TextBox, RadioButton, Slider, Calendar, DatePicker, DataGrid, ListBox, TabControl, and others)
• Managed Control Framework
• Templating Model
• Visual State Manager
• Isolated Storage
• Deep Zoom Technology
• Media – DRM Powered by PlayReady
• Media - Windows Media Audio 10 Professional support
• Media - MediaStreamSource for managed code media file parser and protocol extensibility
• High quality resizing
• Media - Basic SSPL Support
• Cross Domain Network Access
• Easy access to server-side data via Web Services
• Direct access to TCP sockets
• Interoperability with SOAP and REST services, including support for XML, JSON, RSS and Atom data formats
• LINQ (including LINQ to XML, LINQ to JSON, and LINQ to Entities)
• Duplex communications (“push” from Server to Silverlight client)
• Data Binding
• ADO.NET Data Services
• Managed HTML Bridge
• Managed Exception Handling
• .NET Framework Security Enforcement
• Type Safety Verification
• XMLReader/Writer
• Enhanced Keyboard Input Support
• File Upload Support (via WebClient API)
• WPF Compatibility
• Accessibility
• Localization
• Remote Debugging (PC and Mac)