The library for SQLite give an error with framework .net >= 4.0
For solve the issue use this info in app.config file:
<?xml version="1.0"?>
<configuration>
<startup useLegacyV2RuntimeActivationPolicy="true">
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
</startup>
<runtime>
<loadFromRemoteSources enabled="true" />
</runtime>
</configuration>
Source:
http://www.csharpcity.com/mixed-assembly-mode-error-with-net-4-0-sqlite-nunit-and-partcover/