I'm using .NET 4.0, MVC3, and EF5 with code first.
My solution is split up into three projects, with the dependencies as indicated:
Project.Web -> Project.BLL -> Project.DAL
The Project.DAL layer contains my entity framework data context class and all my entities, but my startup project is Project.Web, so it contains my Web.config, connection strings, and the actual SQL compact database.
I'm trying to enable migrations so I can add a new table to my EF model without wiping the existing data. However, when I run "Enable-Migrations", I get
No context type was found in the assembly 'Project.Web'.
Could not load assembly 'Project.Web'. (If you are using Code First Migrations inside Visual Studio this can happen if the startUp project for your solution does not reference the project that contains your migrations. You can either change the startUp project for your solution or use the -StartUpProjectName parameter.)
I eventually found the answer in this question. Basically, in the Package Manager Console there's a "Default project" dropdown. You need to set this to the project that contains your EF context.