配置NLog以记录XML输出中的异常？

<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      autoReload="true"
      throwExceptions="false"
      internalLogLevel="Off"
      internalLogFile="c:\temp\nlog-internal.log">

  <targets>
    <target xsi:type="File" name="xmlFile" fileName="c:\temp\log.xml" />
  </targets>

  <rules>
    <logger name="*" minlevel="Error" writeTo="xmlFile" />
  </rules>
</nlog>

private static Logger logger = LogManager.GetCurrentClassLogger();

try
{
    // 代码逻辑
}
catch (Exception ex)
{
    logger.Error(ex, "An error occurred");
}