Creating a WCF RIA Service for Visual Studio 2012 (Update 2 and higher)

The primary reason you may want to use WCF RIA Services with Visual Studio LightSwitch 2012 is to:

Combine more than one entity into a single entity. Eliminate unneeded columns in an entity to improve performance (otherwise large amounts of data, for example pictures, will be transmitted even when they are not shown). Implement calculated fields that allow the resulting values to be searchable and sortable. Tags: WCF RIA Service