Question

I am pretty new to the Unity Application Block and am a little stuck trying to implement the following. I have a parent and child container. When i resolve a new instance of the child container i want to inject a new UnityContainer into the constructor using the CreateChildContainer method.

public class RootContainer {     private IUnityContainer _container;      public RootContainer()     {         _container = new UnityContainer();         _container.RegisterType<IChildContainer, ChildContainer>();     } }  public interface IChildContainer { }  public class ChildContainer : IChildContainer {     private IUnityContainer _container;      /* I want to inject the parent.CreateChildContainer() into this constructor */     public ChildContainer(IUnityContainer container)     {         _container = container;     } } 

Answer 1

The simplest solution I see is to give the ChildContainer’s constructor the parent container and call the CreateChildContainer() method within the ctor:

public class ChildContainer2 : IChildContainer {     private IUnityContainer _container;      public ChildContainer(IUnityContainer parent)     {         _container = parent.CreateChildContainer();     }      public IUnityContainer Container { get { return _container; } } } 

But why do you want to make the child container a service? Wouldn’t it be better if each component in your app would create a child container by itself if it needs one?