System.Composition.Extensions.DependencyInjection

An adapter that allows using MEF (System.Composition) with Asp.Net Core's DI Framework

Add UseMef() in Program.cs:

        public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
                .UseMef()
                .UseStartup<Startup>();

Configure the MEF container in Startup.cs:

        public void ConfigureContainer(ContainerConfiguration config)
        {
            config.WithAssembly(Assembly.GetExecutingAssembly());
        }

Make sure you use AddControllersAsServices:

        public void ConfigureServices(IServiceCollection services)
        {
            services.AddMvc()
                 .AddControllersAsServices();
            //...