When using Serilog, contextual loggers attach the logging type's name to log events so they can later be found and filtered:

var log = Log.ForContext<SomeClass>();
log.Information("This event is tagged with 'SomeClass'");

Applications that use IoC often accept dependencies as constructor parameters:

public class SomeClass
{
  readonly ILogger _log;
  
  public SomeClass(ILogger log)
  {
    _log = log;
  }
  
  public void Show()
  {
    _log.Information("This is also an event from 'SomeClass'");
  }
}

This library configures Autofac to automatically configure the correct contextual logger for each class into which an ILogger is injected.

First install from NuGet:

Install-Package AutofacSerilogIntegration

Next, create the root logger:

Log.Logger = new LoggerConfiguration()
    .WriteTo.Console()
    .CreateLogger();

Then when configuring the Autofac container, call RegisterLogger():

var builder = new ContainerBuilder();

builder.RegisterLogger();

If no logger is explicitly passed to this function, the default Log.Logger will be used.