serilog-extensions-logging: Destructuring operator doesn't work

I’m playing with Serilog.Framework.Logging and I noticed the following issue when using the Serilog destructuring paramter (“@”): I think it’s best if I illustrate it with some code. Here my test code:

class Foo
{
    public string SValue { get; set; }
    public int IValue { get; set; }
}

[Test]
public void StructuredLogging()
{
    Log.Logger = new LoggerConfiguration().MinimumLevel.Information()
        .WriteTo.Seq("http://localhost:5341")
        .CreateLogger();

    var loggerFactory = new LoggerFactory();
    loggerFactory.AddSerilog(Log.Logger);

    var logger = loggerFactory.CreateLogger(typeof(SerilogTests).FullName);

    var foo = new Foo { SValue = "some value", IValue = 42 };
    Log.Information("Serilog message {@value}", foo);
    logger.LogInformation("M.F.L message: {value}", foo);
    logger.LogInformation("M.F.L message: {@value}", foo);
}

I.e. I’m writing a log message to Microsoft.Framework.Logging after configuring it to use Serilog as well as writing a log message directly through the Serilog API. Here the result:

As you can see the message I wrote using the Serilog API directly (last one in the screenshot) properly destructures the Foo object. However, the message written through M.F.Logging doesn’t.

I did some debugging and I noticed that writing to Serilog directly ends up calling

Logger.Write(LogEventLevel.Information, exception, messageTemplate, propertyValues);

where propertyValues is an array of 1 element containing the Foo object.

Serilog.Framework.Logging also ends up calling this method, however the call looks as follows (see SerilogLogger.Log():

logger.Write(level, exception, messageTemplate);

Here we don’t provide the Foo object as parameter. Instead it was added using ForContext() a couple of lines earlier.

Now, it seems that approach works fine when using “regular” placeholders in the message template string (e.g. “{value}”), but it doesn’t seem to properly work with the destructuring parameter (e.g. “{@value}”).

Is there anything I can do to get this working? Or is this a known issue/limitation?

Thanks for your help!