Value cannot be null. Parameter name: entitySet
I had the same issue and the cause was a POCO class that had a property of type Type
.
Late to the game...but if it helps...
I had this same problem, everything was working fine, but this issue appeared, I added the following to one of my classes
public HttpPostedFileBase File { get; set; }
which seemed to break it.
I ensured I didn't map this to the database by using the following:
[NotMapped]
public HttpPostedFileBase File { get; set; }
You need to add the following using statement:
using System.ComponentModel.DataAnnotations.Schema;
Hope this helps