The ADO.NET vNext Entity Data Model Designer Prototype CTP enables developers to design their data access stack using a designer in Visual Studio. This is an unsupported tool that showcases upcoming ideas for ADO.NET vNext tooling and Visual Studio integration.
It also illustrates how ADO.NET vNext developers might use Visual Studio to design their data access layer. The designer in this CTP has limited functionality and only lets you design the Conceptual layer. There is no support for visually editing mappings (MSL file) or storage (SSDL file) in the designer. This version is the first release on CNET Download.com.