title: Log4net duplicate entries when only one (root) logger is used
body: <p>My log4net configuration looks like this:</p>
  
  <pre><code>&lt;log4net&gt;
   &lt;appender name="CloudWatchLogsAppender" type="CloudWatchAppender.CloudWatchLogsAppender, CloudWatchAppender"&gt;
    &lt;layout type="log4net.Layout.PatternLayout"&gt;
      &lt;conversionPattern value="%date [%thread] %level %logger.%method - %message%newline" /&gt;
    &lt;/layout&gt;
    &lt;groupName value="agroupname" /&gt;
    &lt;streamName value="astreamname" /&gt;
   &lt;/appender&gt;
   &lt;root&gt;
    &lt;level value="INFO" /&gt;
    &lt;appender-ref ref="CloudWatchLogsAppender" /&gt;
   &lt;/root&gt;
   &lt;logger name="Amazon"&gt;
    &lt;level value="OFF" /&gt;
   &lt;/logger&gt;
  &lt;/log4net&gt;
  </code></pre>
  
  <p>In classes, I instantiate the logger with</p>
  
  <pre><code>private static readonly ILog Log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
  </code></pre>
  
  <p>and call the Log.Error(message); only once but in my logs, all the errors are duplicated. Also, this method is being called in a controller class for a WebApi project. </p>
  
  <p>I've read in other questions that it can happen when using multiple loggers and them propagating messages upto the root logger, however, I am only using the root logger in this instance.</p>