System.ArgumentException: Duplicate type name within an assembly

Question

I am working on an ASP.Net MVC 3 web application using EF 4.1. Since today, I am getting this error:

System.ArgumentException: Duplicate type name within an assembly

Answer 1

Ran into this issue today. I deleted all of my tables from the Entity Model .edmx file, the updated my model from the Database (right-click --> update from database).

Then I re-compiled and it ran fine. Such an odd error.

I am running MVC 4 and EF 5.0