Silverlight 5 is out

Silverlight 5 is finally out. you can get the bits here.

For getting started with the Version 5 you can see here the release overview and introduction.

Some pointers on the new release:

Binding and Related

• ICustomTypeProvider (see Alexandra Rusina's post)
• Custom Markup Extensions
• Ancestor RelativeSource Binding
• Implicit Data Templates
• Binding in Style Setters
• DataContextChanged Event
• PropertyChanged now an UpdateSourceTrigger option
•  

Graphics

• XNA 3D API
• Improved Graphics Stack
• XNA 3D built-in effects
• XNA 3D Project Templates with full XNA Content Pipeline
• 3D surface composition settings
• 3D multi-sample anti-aliasing

Media

• Low-Latency Sound using XNA SoundEffect and SoundEffectInstance
• Hardware decoding of unprotected H.264 media
• Variable Speed Playback and Trick-play (new since beta)
• Remote Control and Media Command (Keys) Support

Text

• Text Tracking and Leading
• Linked and Multi-column Text
• OpenType Support
• Pixel Snapped Text and TextOptions

Operating System Integration

• P/Invoke  (also: My Printer Enum Example)
• Multiple Windows
• Unrestricted File System Access in Full Trust
• Full Trust in-browser for enterprise scenarios
• Default Filename in SaveFileDialog and OpenFileDialog
• 64 bit browser support for Windows
• Power awareness for media apps (keep the PC alive while a movie is playing, for example)

Productivity and Performance

• Network Latency Improvements
• Databinding Debugging
• Parser Performance Improvements
• Multi-core JIT for improved start-up time

Controls

• Double and n-click support
• PivotViewer (with improved customization and more)
• ComboBox type-ahead/incremental search

Other

• In-browser HTML for trusted in-browser applications
• PostScript Vector Printing
• Tasks from TPL
• C# Covariance and Contravariance

source : Pete Brown