Question

I study different DI patterns.
And now I interested in the lazy life-time implementation.
For example, I want to write a proxy class that hides the factory behind a service’s interface.
Can any of existing IoC containers (.NET) create this kind of proxy class dynamically at runtime?

interface IService
{
    void Foo();
    void Bar();
}

class ServiceFactoryProxy : IService
{
    private readonly Func<IService> _factory;

    public ServiceFactoryProxy(Func<IService> factory)
    {
        if (factory == null) throw new ArgumentNullException("factory");
        _factory = factory;
    }

    public void Foo()
    {
        _factory().Foo();
    }

    public void Bar()
    {
        _factory().Foo();
    }
}

Answer 1

Here is how it can be done in Castle:

http://litemedia.info/lazy-loading-property-with-castle-dynamicproxy2