What 'additional configuration' is necessary to reference a .NET 2.0 mixed mode assembly in a .NET 4.0 project?

Question

I have a project in which I\'d like to use some of the .NET 4.0 features but a core requirement is that I can use the System.Data.SQLite framework which is compiled against

Answer 1

Using 2.0 and 4.0 assemblies together isn't quite straight forward.

The ORDER of the supported framework declarations in app.config actually have an effect on the exception of mixed mode being thrown. If you flip the declaration order you will get mixed mode error. This is the purpose of this answer.

So if you get the error in a Windows Forms app, , try this, mostly Windows Forms apps.

Or if the project is not Windows Form. In a Web project add this to web.config file.