IoC - Multiple implementations support for a single interface

Question

I am wondering why .Net IoC containers do not easily support multiple implementations for a single interface! May be I am wrong, but as far I have seen, frameworks like Nin

Answer 1

Your premise is wrong.

Windsor quite happily accepts registrations of multiple implementations of the same service. In addition to the named component resolution support mentioned by GSerjo, in Windsor (by default), the first registered implementation will win but you can override this by using IsDefault() method when registering an alternative implementation. Please see http://docs.castleproject.org/Windsor.Registering-components-one-by-one.ashx for more details.

If you wish to exercise more control over the selection from multiple implementations you can create an IHandlerSelector implementation to do so. Please see http://stw.castleproject.org/Windsor.Handler-Selectors.ashx for more details.