Question

So I am trying to set up Log4Net in my Web .NET 4.0 application. I have added the correct .dll to my project and have appended the following to my Web.Config file as starters:

<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
<root>
  <level value="DEBUG" />
  <appender-ref ref="RollingLogFileAppender" />
</root>
</configSections>
 <log4net debug="true">
 <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
  <file value="C:\\TestProj\\TestLog.txt" />
  <appendToFile value="true" />
  <rollingStyle value="Size" />
  <maxSizeRollBackups value="10" />
  <maximumFileSize value="10MB" />
  <staticLogFileName value="true" />
  <layout type="log4net.Layout.PatternLayout">
    <conversionPattern value="%-5p %d %5rms %-22.22c{1} %-18.18M - %m%n" />
  </layout>
 </appender>

However, if I append the “log4net” section to Web.Config, I will receive the error message

Unable to start debugging on the web server. See help for common
configuration problems…..

Make sure the server is running correctly. Verify there are no syntax
errors in the web.config……..

NOTE
I can remove all the internals of this section and leave only the declaration:

<log4net></log4net>

and I will still get the same error.

Can someone give me some pointers on how to track down this error?

Answer 1

Take a look at a sample configurations at log4net documentation homepage.
Chances are you’ve misplaced required tags.