nLog: Filter or remove message - asp.net-core

Question

How do I filter or remove unwanted message from Info level log?
Here is the my result of the logs.
Log Result
I only want to log the yellow color only. But whatever I try, I cannot remove the extra log before and after the yellow color above. Here is my code.
public IActionResult Index()
{
_logger.LogInformation("--- THIS IS MY MESSAGE ---");
return View();
}
nlog.config
...
<target xsi:type="File" name="activityLog" fileName="${gdc:item=appbasepath}\Logs\log-activity-${shortdate}.log"
layout="${longdate}|${uppercase:${level}}|${message:raw=true}" />
...
<logger name="*" level="Info" writeTo="activityLog" />
...

Answer 1

Add a rule to throw away the extra messages
<rules>
<!--All logs, including from Microsoft-->
<logger name="*" minlevel="Trace" writeTo="allfile" />
<!--Skip non-critical Microsoft logs and so log only own logs-->
<logger name="Microsoft.*" maxLevel="Info" final="true" /> <!-- BlackHole without writeTo -->
<logger name="*" minlevel="Trace" writeTo="ownFile-web" />
</rules>
NLog Wiki - Getting Started