ConfigureServiceCollectionWithDecorator2.cs

public void ConfigureServices(IServiceCollection services)
{
    services
        .AddLogging(configure =>
        {
            configure.AddConsole();
            configure.SetMinimumLevel(LogLevel.Information);
        })
        .AddSingleton<IImportantDataProvider, ImportantDataProvider>()
        .AddSingleton<IExampleService, ExampleService>()
        .Decorate<IExampleService, ExampleServiceClassicDecorator>()
}