Unable to use fromEventProperties about nlog.targets.syslog HOT 3 CLOSED

<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xmlns:sl="http://www.nlog-project.org/schemas/NLog.Targets.Syslog.xsd" throwExceptions="true">
  <targets>
    <target xsi:type="ColoredConsole" name="console">
      <layout xsi:type="SimpleLayout" text="${message}${exception:format=ToString,StackTrace}" />
    </target>
    <target xsi:type="sl:Syslog" name="syslog">
      <sl:layout xsi:type="SimpleLayout" text="${message}${exception:format=ToString,StackTrace}" />
      <sl:enforcement>
        <sl:splitOnNewLine>false</sl:splitOnNewLine>
        <sl:transliterate>false</sl:transliterate>
        <sl:replaceInvalidCharacters>false</sl:replaceInvalidCharacters>
        <sl:truncateFieldsToMaxLength>true</sl:truncateFieldsToMaxLength>
        <sl:truncateMessageTo>1024</sl:truncateMessageTo>
      </sl:enforcement>
      <sl:messageCreation>
        <sl:facility>Local4</sl:facility>
        <sl:rfc>rfc5424</sl:rfc>
        <sl:rfc5424>
          <sl:hostname xsi:type="SimpleLayout" text="${machinename}" />
          <sl:appName xsi:type="SimpleLayout" text="${processname}" />
          <sl:procId xsi:type="SimpleLayout" text="${processid}" />
          <sl:msgId xsi:type="SimpleLayout" text="${threadid}" />
          <sl:structuredData>
            <sl:fromEventProperties xsi:type="SimpleLayout" text="[app@0 ${all-event-properties:format=[key]=&quot;[value]&quot;:separator= :includeCallerInformation=False}]" />
          </sl:structuredData>
        </sl:rfc5424>
      </sl:messageCreation>
      <sl:messageSend>
        <sl:protocol>UDP</sl:protocol>        
        <sl:udp>
          <sl:server>syslogserver</sl:server>
          <sl:port>514</sl:port>
        </sl:udp>
      </sl:messageSend>
    </target>
  </targets>
  <rules>
    <logger name="*" minlevel="Debug" writeTo="console" />
    <logger name="*" minlevel="Debug" writeTo="syslog" />
  </rules>
</nlog>