Serilog.Extensions.Logging

A Serilog provider for Microsoft.Extensions.Logging, the logging subsystem used by ASP.NET Core.

ASP.NET Core 2.0+ Instructions

ASP.NET Core 2.0 applications should prefer Serilog.AspNetCore and UseSerilog() instead.

.NET Core 1.0, 1.1 and Default Provider Integration

The package implements AddSerilog() on ILoggingBuilder and ILoggerFactory to enable the Serilog provider under the default Microsoft.Extensions.Logging implementation.

First, install the Serilog.Extensions.Logging NuGet package into your web or console app. You will need a way to view the log messages - Serilog.Sinks.Console writes these to the console.

Install-Package Serilog.Extensions.Logging -DependencyVersion Highest
Install-Package Serilog.Sinks.Console

Next, in your application's Startup method, configure Serilog first:

using Serilog;

public class Startup
{
  public Startup(IHostingEnvironment env)
  {
    Log.Logger = new LoggerConfiguration()
      .Enrich.FromLogContext()
      .WriteTo.Console()
      .CreateLogger();
      
    // Other startup code

Finally, for .NET Core 2.0+, in your Startup class's Configure() method, remove the existing logger configuration entries and call AddSerilog() on the provided loggingBuilder.

  public void ConfigureServices(IServiceCollection services)
  {
      services.AddLogging(loggingBuilder =>
      	loggingBuilder.AddSerilog(dispose: true));
      
      // Other services ...
  }

For .NET Core 1.0 or 1.1, in your Startup class's Configure() method, remove the existing logger configuration entries and call AddSerilog() on the provided loggerFactory.

  public void Configure(IApplicationBuilder app,
                        IHostingEnvironment env,
                        ILoggerFactory loggerfactory,
                        IApplicationLifetime appLifetime)
  {
      loggerfactory.AddSerilog();
      
      // Ensure any buffered events are sent at shutdown
      appLifetime.ApplicationStopped.Register(Log.CloseAndFlush);

That's it! With the level bumped up a little you should see log output like:

[22:14:44.646 DBG] RouteCollection.RouteAsync
	Routes: 
		Microsoft.AspNet.Mvc.Routing.AttributeRoute
		{controller=Home}/{action=Index}/{id?}
	Handled? True
[22:14:44.647 DBG] RouterMiddleware.Invoke
	Handled? True
[22:14:45.706 DBG] /lib/jquery/jquery.js not modified
[22:14:45.706 DBG] /css/site.css not modified
[22:14:45.741 DBG] Handled. Status code: 304 File: /css/site.css

Credits

This package evolved from an earlier package Microsoft.Framework.Logging.Serilog provided by the ASP.NET team.