I was trying to add Graylog support to a project. I added the latest <code>NLog.Web.AspNetCore</code> and <code>NLog.Web.AspNetCore.Targets.Gelf</code> packages, and set up the correct NLog.config file. I got the following exception message in the <code>/c/temp/nloginternallog_bankblanceapi.txt</code>
<pre><code>Error GelfTarget(Name=graylog): Exception in Write Exception: Newtonsoft.Json.JsonSerializationException: Self referencing loop detected for property 'Module' with type 'System.Reflection.RuntimeModule'. Pat
h 'Metadata[8].MethodInfo.Module.Assembly.EntryPoint'.
</code></pre>I googled quite a while but didn't get a workaround. Eventually, I got the following solution:
Downgrade the NLog.Web.AspNetCore package to version 4.15.0, and that exception is gone! I didn't try other versions, so I don't know exactly which version introduced this issue.

I was trying to add Graylog support to a project. I added the latest `NLog.Web.AspNetCore` and `NLog.Web.AspNetCore.Targets.Gelf` packages, and set up the correct NLog.config file. I got the following exception message in the `/c/temp/nloginternallog_bankblanceapi.txt`

```
Error GelfTarget(Name=graylog): Exception in Write Exception: Newtonsoft.Json.JsonSerializationException: Self referencing loop detected for property 'Module' with type 'System.Reflection.RuntimeModule'. Pat
h 'Metadata[8].MethodInfo.Module.Assembly.EntryPoint'.
``` 

I googled quite a while but didn't get a workaround. Eventually, I got the following solution:

Downgrade the NLog.Web.AspNetCore package to version 4.15.0, and that exception is gone! I didn't try other versions, so I don't know exactly which version introduced this issue.


NLog logging to Graylog: unexpected Newtonsoft.Json.JsonSerializationException