What instantiate-able types implementing IQueryable are available in .Net 4.0?

Question

Within the context of C# on .Net 4.0, are there any built-in objects that implement IQueryable?

Answer 1

Well, your question is kinda weird... but I believe that if you look at an interface in Reflector, it will give you a list of implementers in the loaded assemblies.

As a disclaimer I have not used Reflector since it went pay-for-play so I might be wrong.