Number of members in conceptual type does not match with number of members on object side type

Question

I\'m using .net framework 3.5 SP1.

After adding a column to one table in Sql Server (as well as changing an existing column from allowing nulls to not nullable), I c

Answer 1

This error can also happen if the EDMX file was changed outside Visual Studio. Right click on the EDMX file and click "Run Custom Tool"