test.cs

public class BackgroundGenerator : IHostedService
{
    private readonly ILogger<BackgroundGenerator> logger;
    private readonly IWorker worker;

    public BackgroundGenerator(ILogger<BackgroundGenerator> logger,
        IWorker worker)
    {
        this.logger = logger;
        this.worker = worker;
    }

    public async Task StartAsync(CancellationToken cancellationToken)
    {
        await worker.DoWork(cancellationToken);
    }

    public Task StopAsync(CancellationToken cancellationToken)
    {
        logger.LogInformation("Generator worker stopping");
        return Task.CompletedTask;
    }
}