Creating multiple scopes in a console application

Program.cs

private static void UsingScoped()
{
    Console.WriteLine(nameof(UsingScoped));

    ServiceProvider RegisterServices()
    {
        var services = new ServiceCollection();
        services.AddSingleton<INumberService, NumberService>();
        services.AddScoped<IServiceA, ServiceA>();
        services.AddSingleton<IServiceB, ServiceB>();
        services.AddTransient<IServiceC, ServiceC>();
        return services.BuildServiceProvider();
    }

    using (ServiceProvider container = RegisterServices())
    {
        using (IServiceScope scope1 = container.CreateScope())
        {
            IServiceA a1 = scope1.ServiceProvider.GetService<IServiceA>();
            a1.A();
            IServiceA a2 = scope1.ServiceProvider.GetService<IServiceA>();
            a2.A();
            IServiceB b1 = scope1.ServiceProvider.GetService<IServiceB>();
            b1.B();
            IServiceC c1 = scope1.ServiceProvider.GetService<IServiceC>();
            c1.C();
            IServiceC c2 = scope1.ServiceProvider.GetService<IServiceC>();
            c2.C();
        }

        Console.WriteLine("end of scope1");

        using (IServiceScope scope2 = container.CreateScope())
        {
            IServiceA a3 = scope2.ServiceProvider.GetService<IServiceA>();
            a3.A();
            IServiceB b2 = scope2.ServiceProvider.GetService<IServiceB>();
            b2.B();
            IServiceC c3 = scope2.ServiceProvider.GetService<IServiceC>();
            c3.C();
        }
        Console.WriteLine("end of scope2");
        Console.WriteLine();
    }
}