demo.cs

// init logger
DevelopLogger developLogger = new DevelopLogger(new LoggerConfiguration()
    .MinimumLevel.Debug()
    .Enrich.WithMachineName()
    .Enrich.FromLogContext()
    .WriteTo.Console()
    .CreateLogger());

UserLogger userLogger = new UserLogger(new LoggerConfiguration()
    .MinimumLevel.Debug()
    .Enrich.WithMachineName()
    .Enrich.FromLogContext()
    .WriteTo.Console()
    .WriteTo.Elasticsearch(new ElasticsearchSinkOptions(new Uri("http://localhost:9200"))
    {
        MinimumLogEventLevel = LogEventLevel.Information,
        AutoRegisterTemplate = true,
        AutoRegisterTemplateVersion = AutoRegisterTemplateVersion.ESv6,
        IndexFormat = "console-index2-{0:yyyy.MM}",
        FailureCallback = e => Console.WriteLine("Unable to submit event " + e.MessageTemplate)
    })
    .CreateLogger());

// start log, this will be using dependency injection
developLogger.Log.Warning("{random} Serilog Example: {now}", random.Next(300, 500),
    DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss:fff"));
userLogger.Log.Error(new NotImplementedException("yoyoyo"), "{random} Serilog Example: {now}",
    random.Next(300, 500), DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss:fff"));