How to: Upgrade Rich Internet Applications to Visual Studio 2015 RC
WCF Rich Internet Application Services item templates and project templates (for example, Silverlight Business Application template) have been removed. WCF Rich Internet Application Services projects and additive changes are discouraged.
Even though the Business Application Project template has been removed, you can still create new Rich Internet Application Services projects by using the basic Silverlight project templates and enabling the Rich Internet Application Services Link. The New Domain Service Class wizard item template has been removed, and you can no longer use the scaffolding of Domain Services by selecting entities. You can add new DomainService objects to your projects by using the basic Class template and then adding the necessary imports and code to the class.