C# Console app sample code for AutoFac DI and No-DI

C# console app example with AutoFac DI

using Autofac;
using System;

namespace AutoFacHW
{
    class Program
    {
        static void Main(string[] args)
        {
            var container = ContainerConfig.Configure();
            using (var scope = container.BeginLifetimeScope())
            {
                var app = scope.Resolve<IApplication>();
                app.Run();
            }
        }
    }

    public interface IApplication
    {
        void Run();
    }

    public interface IService
    {
        void WriteInformation(string message);
    }

    public class Service : IService
    {
        public void WriteInformation(string message)
        {
            Console.WriteLine(message);
        }
    }

    public static class ContainerConfig
    {
        public static IContainer Configure()
        {
            var builder = new ContainerBuilder();

            builder.RegisterType<Application>().As<IApplication>();
            builder.RegisterType<Service>().As<IService>();

            return builder.Build();
        }
    }

    public class Application : IApplication
    {
        private readonly IService _service;
        public Application(IService service)
        {
            _service = service;
        }

        public void Run()
        {
            _service.WriteInformation("Injected!");
        }
    }
}

C# console app with no DI

using System;

namespace NoDI
{
    class Program
    {
        static void Main(string[] args)
        {
            var app = new Application();
            app.Run();
        }
    }

    public interface IService
    {
        void WriteInformation(string message);
    }

    public class Service : IService
    {
        public void WriteInformation(string message)
        {
            Console.WriteLine(message);
        }
    }

    public class Application
    {
        private readonly IService _service;

        public Application()
        {
            _service = new Service();
        }

        public void Run()
        {
            _service.WriteInformation("No DI!");
        }
    }
}