Autofac Demo

Program.cs

using Autofac;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Primitives;
using System;
using System.Collections.Generic;
using System.Threading;

// You must add the `Autofac` and `Microsoft.Extensions.Configuration` NuGet packages for this to work

namespace AutofacDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            var builder = new ContainerBuilder();
            builder.RegisterType<Greeter>();
            builder.Register(c => {
                var config = new MyConfig();
                config.Data["greeting"] = "Greg @ " + DateTime.Now.ToString();
                return config;
            }).As<IConfiguration>();

            var container = builder.Build();

            var greeter = container.Resolve<Greeter>();
            greeter.Greet();

            Thread.Sleep(3000);

            greeter.Greet();


            Console.ReadKey();
        }
    }

    public class Greeter
    {
        private readonly IConfiguration config;

        public Greeter(IConfiguration config)
        {
            this.config = config;
        }

        public void Greet()
        {
            Console.WriteLine($"Hello {config["greeting"]}");
        }
    }


    public class MyConfig : IConfiguration
    {
        public Dictionary<string, string> Data = new Dictionary<string, string>();

        public string this[string key] { get => Data[key]; set => Data[key] = value; }

        public IEnumerable<IConfigurationSection> GetChildren()
        {
            throw new NotImplementedException();
        }

        public IChangeToken GetReloadToken()
        {
            throw new NotImplementedException();
        }

        public IConfigurationSection GetSection(string key)
        {
            throw new NotImplementedException();
        }
    }
}