System.Data.SQLite

I have added the System.Data.Sqlite.dll to my project (VS2012). I have added a reference. I have doublechecked, that the reference has been created (Reference Properties > Path is correct). 
Got following error messages when compile: 
The type or namespace name 'SQLite' does not exist in the namespace 'System.Data' (are you missing an assembly reference?)

Running the setup is not required to simply add a reference to your project.
Did you read about the different download package types on the download page?

Also, the project will need to refer to the .NET Framework 4.5 to make use of
these assemblies, not the .NET Framework 4.0.