1、Creating a WCF RIA Service based on custom objects for use in LightSwitch​​

​​http://social.msdn.microsoft.com/Forums/en/lightswitchgeneral/thread/f2758b93-6601-4c19-af7b-afa905721158​​

2、

How to Communicate Across LightSwitch Screens (Sheel Shah)

​​http://blogs.msdn.com/b/lightswitch/archive/2010/11/17/communicating-across-lightswitch-screens.aspx​​