Dependency Injection - Hello World

Here is a simple implementation of Dependency Injection. UnityContainer is initialize in code but you can use configuration file if you like.

using System;
using Microsoft.Practices.Unity;
 
namespace DependencyInjectionSample
{
    public interface IUnityClass
    {
        void HelloWorld();
    }
 
    public class UnityClass : IUnityClass
    {
        public void HelloWorld()
        {
            Console.WriteLine("Hello!");
        }
    }
 
    /// <summary>
    ///     This class is used to manage dependency injection using Unity.
    ///     It Manages containers and configurations.
    /// </summary>
    internal static class DependencyInjection
    {
        private static IUnityContainer InitUnityContainer()
        {
            IUnityContainer myContainer = new UnityContainer();
 
            //Register types
            myContainer.RegisterType(typeof (IUnityClass), typeof (UnityClass));
            //...
 
            return myContainer;
        }
 
 
        public static T Resolve<T>()
        {
            IUnityContainer myContainer = InitUnityContainer();
         
            return (T) myContainer.Resolve(typeof (T));
        }
    }
 
 
    public class HelloWorld
    {
        public HelloWorld()
        {
            var di = DependencyInjection.Resolve<IUnityClass>();
            di.HelloWorld();
        }
    }
}