Autofac–Configure Container in .NET Core WorkerService

.NET Core 3.0 introduced a new WorkerService template that can be used as a starting point for long running service apps. As the worker service template didn’t use a Startup.cs file like in a traditional ASP.NET Core application, it wasn’t immediately obvious to me where I had to configure my IoC container.

So a quick tip for my future self, you can do this using the ConfigureContainer() method on the HostBuilder:

	Host.CreateDefaultBuilder(args)
	.UseServiceProviderFactory(new AutofacServiceProviderFactory())
	.ConfigureServices((hostContext, services) =>
	{
	services.AddHostedService<Worker>();
	})
	.ConfigureContainer<ContainerBuilder>((hostContext,builder)=> {
	//Configure your container here
	});

view raw Program.cs hosted with ❤ by GitHub

Remark: The example above is using Autofac but the approach is similar for other containers.