Serilog.Settings.Reloader 2.0.9.3

Serilog.Settings.Reloader provides reloadable settings for Serilog.

SwitchableLogger is assigned with new root ILogger when configuration is modified.

// Assign SwitchableLogger.Instance to Serilog.Log.Logger
Serilog.Log.Logger = SwitchableLogger.Instance;

// Assign logger to SwitchableLogger.Instance
SwitchableLogger.Instance.Logger = new Serilog.LoggerConfiguration()
    .MinimumLevel.Verbose()
    .WriteTo.Console(outputTemplate: "[{Timestamp:HH:mm:ss} {Level:u3} {SourceContext}] {Message:lj}{NewLine}{Exception}")
    .CreateLogger();

// Create logger
ILogger logger = Serilog.Log.ForContext<Program>();

// Write
logger.Information("Hello World");

// Reconfigure 
ILogger newLogger = new Serilog.LoggerConfiguration()
    .MinimumLevel.Verbose()
    .WriteTo.Console(outputTemplate: "[{SourceContext}] {Message:lj}{NewLine}{Exception}")
    .CreateLogger();
// Assign new logger
SwitchableLogger.Instance.Set(newLogger, disposePrev: true);

// Write with the previous logger instance, but with different settings
logger.Information("Hello world again");

.AddSerilogConfigurationLoader() can be used with dependency injection's ILoggingBuilder.

// Read configuration
IConfigurationRoot configuration = new ConfigurationBuilder()
    Add(config)
    .Build();

// Service collection
IServiceCollection serviceCollection = new ServiceCollection()
    .AddLogging(loggingBuilder =>
        loggingBuilder
            .AddSerilog(SwitchableLogger.Instance, true)
            .AddSerilogConfigurationLoader(configuration, SwitchableLogger.Instance)
        );

// Services
using (var services = serviceCollection.BuildServiceProvider())
{
    // Create logger
    Microsoft.Extensions.Logging.ILogger logger = services.GetService<Microsoft.Extensions.Logging.ILogger<Program>>();

    // Write
    logger.LogInformation("Hello World");

    // Modify config
    config.Set("Serilog:WriteTo:0:Args:OutputTemplate", "[{SourceContext}] {Message:lj}{NewLine}{Exception}");
    configuration.Reload();

    // Write with the previous logger instance, but with different settings
    logger.LogInformation("Hello world again");
}

.AddSerilogConfigurationLoader(IConfiguration, SwitchableLogger, Func<IConfiguration, ILogger>) third argument specifies load function.

loggingBuilder
    .AddSerilog(SwitchableLogger.Instance, true)
    .AddSerilogConfigurationLoader(configuration, SwitchableLogger.Instance, 
        c => new Serilog.LoggerConfiguration().ReadFrom.Configuration(c).CreateLogger())
    );