How to inject a reference to a specific IHostedService implementation?

Question

My web app has a background service that listens to a service bus. Based on the docs, it looks like the built-in way to run a background service is to implement IHoste

Answer 1

My little helper code in response to the excellent answer of jjxtra

    /// 

    /// Instead of calling service.AddHostedService you call this make sure that you can also access the hosted service by interface TImplementation
    /// https://stackoverflow.com/a/64689263/619465
    /// 
    /// The service collection
    public static void AddInjectableHostedService(this IServiceCollection services)
        where TService : class
        where TImplementation : class, IHostedService, TService
    {
        services.AddSingleton();
        services.AddSingleton(provider => provider.GetRequiredService());
        services.AddSingleton(provider => provider.GetRequiredService());
    }

So this will allow you to register your IHostedService with

        services
            .AddInjectableHostedService();

Where MyHostedServiceType off course implements some interface (IExposeSomething) with things that you want to expose to other types.