I mainly develop software in C# and Python at work, and I sure do miss some of the convenience that lisp-inspired languages offer. I'm responsible for the overa

I mainly develop software in C# and Python at work, and I sure do miss some of the convenience that lisp-inspired languages offer. I'm responsible for the overall architecture of quite some large-ish enterprise apps. There's a reason why many Java and C# business applications have tons of MySuperAbstractFactoryProvider classes and use reflection-based look-up of metadata attributes obsessively. There's just no other way to provide a flexible framework that meets the changing and often arcane demands of our customers. About macros, in the case of C#, what, if not a kind of macro, is the 'using' statement that works with IDisposables? If it's useful here, why not in other places?