Unrecognized configuration section log4net
Solution 1:
You need to declare the log4net section:
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
</configSections>
Take a closer look at the documentation which explains the necessary things to do.
Solution 2:
<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,Log4net"/>
</configSections>
</configuration>
add to your app.config file