Dependency Injection in .NET with examples?

Question

Can someone explain dependency injection with a basic .NET example and provide a few links to .NET resources to extend on

Answer 1

Install below Nuget packages in main mvc4 project name SampleDependency. Unity.mvc4, unity.webapi and MicrosoftAsp.Net Web API 2.2 Web host

In web project

public static class Bootstrapper
{
    public static IUnityContainer Initialise()
    {
        var container = BuildUnityContainer();

        DependencyResolver.SetResolver(new UnityDependencyResolver(container));
        GlobalConfiguration.Configuration.DependencyResolver = new Unity.WebApi.UnityDependencyResolver(container);

        return container;
    }

    private static IUnityContainer BuildUnityContainer()
    {
        var container = new UnityContainer();

        // register all your components with the container here
        // it is NOT necessary to register your controllers

        // e.g. container.RegisterType();
        container.RegisterType();
        container.RegisterType();

        RegisterTypes(container);

        return container;
    }
    public static void RegisterTypes(IUnityContainer container)
    {

    }
}