A better take on DI wireups in .NET: https://nblumhardt.com/2010/01/the-relationship-zoo/

The gist:

    Relationship                                Adapter Type     Meaning
    A needs a B                                 None             Dependency
    A needs a B at some point in the future     Lazy<B>          Delayed instantiation
    A needs to create instances of B            Func<B>          Dynamic instantiation
    A provides parameters of types X and Y to B Func<X,Y,B>      Parameterisation
    A needs all the kinds of B                  IEnumerable<B>   Enumeration