DiagnosticContext doesn't use the logger created by LoggerConfiguration

[cbersch]

When using the

public static IHostBuilder UseSerilog(
    this IHostBuilder builder,
    Action<HostBuilderContext, IServiceProvider, LoggerConfiguration> configureLogger,
    bool preserveStaticLogger = false,
    bool writeToProviders = false)

extension and calling it with preserveStaticLogger: true, the ILogger, which is created by LoggerConfiguration, is not used by DiagnosticContext.
I would expect, the logger instance itself to be always passed to DiagnosticContext.

[nblumhardt]

Interesting - this sounds like it would be a bug, needs some 👀 - thanks!

[cbersch]

Ok, I gave it a try and fixed it in #53.

[fvarukhin]

I faced with the same issue with using Lamar and Serilog, - standard Serilog initialization doesn't works with Lamar initialization.
I was failed to find solution in internet and started to serf in source code of Serilog and Lamar
I want to suggest work around which is works in my case.

1. You need to create Serilog configuration class

public class SerilogConfiguration : ServiceRegistry
    {
        public SerilogConfiguration(IConfiguration config)
        {
            Log.Logger = new LoggerConfiguration()
                .ReadFrom.Configuration(config)
                .CreateLogger();
            this.AddLogging(loggingBuilder =>
                loggingBuilder.AddSerilog());
            DiagnosticContext implementationInstance = new DiagnosticContext(null);
            this.AddSingleton(implementationInstance);
            this.AddSingleton((IDiagnosticContext) implementationInstance);
        }
    }

2. In your program.cs use this code for Serilog initialization in my case Im using appSettings.json for storing serilog configuration

public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureLogging((context, logging) => logging.ClearProviders())
                .UseLamar((builder,registry) =>
                {
                    registry.IncludeRegistry(new SerilogConfiguration(builder.Configuration));
                })
                .ConfigureWebHostDefaults(webBuilder => { webBuilder.UseStartup<Startup>(); });