Inheritance security rules violated by type: 'MySql.Data.Entity.MySqlEFConfiguration'

Question

I\'ve created an asp.net web application which should connect to a mysql database.

I´m using entity framework 6 with an ado.net entity data model. I´ve also followed

Answer 1

I downgraded MySql.Data.Entity.EF6 to an older version and it solved my problem.

Answer 2

Downgrade MySql.Data.Entity from version 6.10.x to 6.9.10 can solve the problem. It solved mine

Answer 3

The same for me with VS2017. I used MySql.Data.Entity v6.9.10.
Prior to that I also installed mysql connector for .Net version 6.9.10.

• After that I installed the NuGet package for MySql.Data.Entity.
• Last step was to modify the web.config accordingly:
  • connection string,
  • entity framework and
  • system.data (be aware that you have to update in the last two the version as well if you take them from mysql website)

• Ahh not to forget I added also

  DbConfiguration.SetConfiguration(new MySqlEFConfiguration()) 
  

  in my app start up.

and it finally worked :D

Answer 4

Upgrading nuget package to 6.10.8 fixed this for me

Answer 5

I've had some horrible instability problems with 6.9.10. It also seems like it has has been removed from NuGet. Under heavy load i was getting "database not found errors" sporadically.

Try 6.9.11 instead. That seems stable for me. And its available on NuGet.

Answer 6

I got the same issue after upgrading the MySql NuGet packages from 6.9.8 to 6.10.6 in VS 2017 Community. I followed the accepted answer's instructions and downgrading back to 6.9.x fixed it. Upon futher investigation, Oracle has fixed the bug in the upcoming 6.10.7 release (https://bugs.mysql.com/bug.php?id=89134).

In short, until 6.10.7 is released, downgrade back to 6.9.x! I reverted back using the Nuget package manager and didn't have to change anything else to make it work.