Autofac

Example:

The basic pattern for integrating Autofac into your application is:

• Structure your app with inversion of control (IoC) in mind.
• Add Autofac references.
• At application startup…
• Create a ContainerBuilder.
• Register components.
• Build the container and store it for later use.
• During application execution…
• Create a lifetime scope from the container.
• Use the lifetime scope to resolve instances of the components.

using Autofac;

using System;

namespace AutofacDemo

{

    class Program

    {

        private static IContainer Container { get; set; }

        static void Main(string[] args)

        {

            ContainerBuilder builder = new ContainerBuilder();

            builder.RegisterType<Output>().As<IOutput>();

            builder.RegisterType<DateWriter>().As<IDateWriter>();

            //New Date Class Register With Date Interface

            // Override Date Writer method with New Date Writer Method

            builder.RegisterType<NewDateWriter>().As<IDateWriter>();

            Container = builder.Build();

            WriteDate();

            Console.ReadLine();

        }

        private static void WriteDate()

        {

            using (var scope = Container.BeginLifetimeScope())

            {

                var writer = scope.Resolve<IDateWriter>();

                writer.WriteDate();

            }

        }

    }

    public interface IOutput

    {

        void Write(string content);

    }

    public class Output : IOutput

    {

        public void Write(string content)

        {

            Console.WriteLine(content);

        }

    }

    public interface IDateWriter

    {

        void WriteDate();

    }

    public class DateWriter : IDateWriter

    {

        private IOutput _output;

        public DateWriter(IOutput output)

        {

            _output = output;

        }

        public void WriteDate()

        {

            _output.Write(DateTime.Today.ToShortDateString());

        }

    }

    public class NewDateWriter : IDateWriter

    {

        private IOutput _output;

        public NewDateWriter(IOutput output)

        {

            _output = output;

        }

        public void WriteDate()

        {

            _output.Write(DateTime.Today.AddDays(1).ToShortDateString());

        }

    }

}

Add Autofac Reference from Nuget 

Please find code Repository here in GIT