How to fix System.Data.Edm.EdmEntityType has no key

Question

Does anybody know how to fix this error:

System.Data.Edm.EdmEntityType: : EntityType \'BlogTags\' has no key defined. Define the key for this EntityTy

Answer 1

In the spirit of sharing solutions to the same problem...

I had the same problem but it wasn't fixed by the [Key] solution when coding a MVC 4 app with VS2012.

I forgot to include the getter and setters on my model members. Just having them public isn't enough and Visual Studio will give you the same error message.

I have identified 5 scenarios that result in this message - covered in a small blog post about it.