Silverlight 3 runtime and SDK introduce many new controls. Some of these controls were previously released as part of the Silverlight Toolkit and some are completely new. Regardless of their origins, since they are now part of the Silverlight 3 product, these controls have full reference documentation that includes art, code examples and links to live samples. These controls enable scenarios such as auto-completion for a textbox, the display of hierarchical data, navigation within pages of a Silverlight application and much more. Here's a list of new controls and dialogs:
AutoComplete Box
ChildWindow
DataPager
Description Viewer
Frame
HeaderedItems Control
Label
Page
SaveFileDialog
TreeView
Validation Summary
Virtualizing Stack Panel
For more about silverlight SDK http://blogs.msdn.com/silverlight_sdk/
