Question

That error occurs while trying to connect to SQLite database file

Mixed mode assembly is built against version ‘v2.0.50727’ of the runtime and cannot be loaded in the 4.0 runtime without additional
configuration information.

My Connection String is:

“data source=KBank;Version=3;”

I am using Visual Studio 2010 .Net Framework 4.0

any idea about what are additional configurations?

Answer 1

You need to set useLegacyV2RuntimeActivationPolicy in your startup element of the app.config file.

You can make an app.config file, and set it to:

<configuration>
   <startup useLegacyV2RuntimeActivationPolicy="true">
      <supportedRuntime version="v4.0"/>
   </startup>
</configuration>

This causes all assemblies to use the CLR 4, and “effectively disabling the in-process side-by-side feature” of the CLR. This is required when using mixed mode assemblies (which contain native code) written in .NET 3.5 or earlier from a .NET 4 application.