Log4Net "Could not find schema information" messages

Question

I decided to use log4net as a logger for a new webservice project. Everything is working fine, but I get a lot of messages like the one below, for every log4net tag I am using in my web.config:

Could not find schema information for the element 'log4net'...

Below are the relevant parts of my web.config:

  <configSections>
    <section name="log4net" 
        type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
  </configSections>
  <log4net>
    <appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
      <file value="C:\log.txt" />
      <appendToFile value="true" />
      <rollingStyle value="Size" />
      <maxSizeRollBackups value="10" />
      <maximumFileSize value="100KB" />
      <staticLogFileName value="true" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date [%thread] %-5level: %message%newline" />
      </layout>
    </appender>
    <logger name="TIMServerLog">
      <level value="DEBUG" />
      <appender-ref ref="RollingFileAppender" />
    </logger>
  </log4net>

Solved:

1. Copy every log4net specific tag to a separate xml-file. Make sure to use .xml as file extension.
2. Add the following line to AssemblyInfo.cs:

[assembly: log4net.Config.XmlConfigurator(ConfigFile = "xmlFile.xml", Watch = true)]

nemo added:

Just a word of warning to anyone follow the advice of the answers in this thread. There is a possible security risk by having the log4net configuration in an xml off the root of the web service, as it will be accessible to anyone by default. Just be advised if your configuration contains sensitive data, you may want to put it else where.

---

@wcm: I tried using a separate file. I added the following line to AssemblyInfo.cs

[assembly: log4net.Config.XmlConfigurator(ConfigFile = "log4net.config", Watch = true)]

and put everything dealing with log4net in that file, but I still get the same messages.

Answer 1

You can bind in a schema to the log4net element. There are a few floating around, most do not fully provide for the various options available. I created the following xsd to provide as much verification as possible: http://csharptest.net/downloads/schema/log4net.xsd

You can bind it into the xml easily by modifying the log4net element:

<log4net 
     xsi:noNamespaceSchemaLocation="http://csharptest.net/downloads/schema/log4net.xsd" 
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">