Using serilog, I'm trying to add custom enricher of my own via appSettings.json without success.

I went exactly by the book, following the documentation. I also followed non official introduction like this https://www.ctrlaltdan.com/2018/08/14/custom-serilog-enrichers/

The introduction above work fine with nuggets enrichers (like Serilog.Enrichers.Environment, Serilog.Enrichers.Thread and so on) but doesn't work with my custom enricher. Here is the relevant code:

public class ClassNameEnricher: ILogEventEnricher
{
    private string GetClassName()
    {
        StackTrace trace = new StackTrace();
        bool foundFrame = false;
        int currentFrame = 0;
        while (!foundFrame)
        {
            if (trace.GetFrame(currentFrame).GetMethod().ReflectedType.FullName == typeof(Logger).FullName)
            {
                foundFrame = true;
            }

            currentFrame++;
        }

        return trace.GetFrame(currentFrame).GetMethod().ReflectedType.FullName;
    }

    public virtual void Enrich(LogEvent logEvent, ILogEventPropertyFactory propertyFactory)
    {
        LogEventProperty className = propertyFactory.CreateProperty("ClassName", GetClassName());
        logEvent.AddPropertyIfAbsent(className);
    }
}


public static class LoggerEnrichmentConfigurationExtensions
{
    public static LoggerConfiguration WithClassName(this LoggerEnrichmentConfiguration enrich)
    {
        return enrich.With<ClassNameEnricher>();
    }
}

and the settings:

I'll note that adding my enrihcer in code working fine. Any suggestion?