Dependency Injection using Unity Container
This demo is about how we can use dependency injection and get it resolved with the help of unity.
Interface - ISubject has two method string GetDescription(); string GetReferenceBookName();
Math and Physics class are implementing ISubject according to their need.
In Program.cs --
Using the container:
static IUnityContainer container = new UnityContainer();
and Register the Isubject:
static void SetUpContainer()
{
container.RegisterType<ISubject, Math>(); // This means -- when you get ISubject, use Math
//Or use the below if you want Physics instance
//container.RegisterType<ISubject, Physics>(); //// This means -- when you get ISubject, use Physics
}
From main, we can use in convention way like:
ISubject subject = new Math(); //Or like below line
//ISubject subject = new Physics();
Console.WriteLine("Subject Desc: " subject.GetDescription());
Console.WriteLine("Reference Book: " subject.GetReferenceBookName());
With Unity, same can be achieved as :
SetUpContainer();
ISubject sub = container.Resolve<ISubject>();
Console.WriteLine("Unity : Subject Desc: " sub.GetDescription());
Console.WriteLine("Unity: Reference Book: " sub.GetReferenceBookName());