BlogPost3_ServiceRegistration2.cs

public static class ServicesExtensions
{
    public static void AddProxiedScoped<TInterface, TImplementation>(this IServiceCollection services)
        where TInterface : class
        where TImplementation : class, TInterface
    {
        services.AddScoped<TImplementation>();
        services.AddScoped(typeof(TInterface), serviceProvider =>
        {
            var proxyGenerator = serviceProvider.GetRequiredService<ProxyGenerator>();
            var actual = serviceProvider.GetRequiredService<TImplementation>();
            var interceptors = serviceProvider.GetServices<IInterceptor>().ToArray();
            return proxyGenerator.CreateInterfaceProxyWithTarget(typeof(TInterface), actual, interceptors);
        });
    }
}

// In ConfigureServices
services.AddProxiedScoped<IBlogService, BlogService>();