Silverlight Offline Documentation (March 2008)
You can get the offline CHM that contains Silverlight documentation updated for March 2008 here. This doc set was released during MIX 08.
This CHM file is handy if you want to download the MSDN documentation right onto your machine but don't have Visual Studio. The search is pretty fast although you might have to scroll down the results a bit because the search algorithm doesn't always return the most likey candidates on top.
