SQLite An attempt was made to load a program with an incorrect format.

Using SQLite in dotnet may result in an error: "An attempt was made to load a program with an incorrect format."

In my case the problem was the development webserver of Visual Studio 2017, which runs in 32-bit mode by default.
See the setting: http://tegtips.blogspot.nl/2014/07/visual-studio-2013-iis-express-64-bit.html