Dumb question here. If ASP.net core is more of a back-end web framework to handle HTTP requests and so forth, what usually compliments it as the run-time platform? For example if we look at other stacks, Express would be the similar back-end web framework that ASP.net fills and Node.js would be the runtime platform. I suppose if you're working with cross-platform mobile app development, then React Native or Xamarin would be the run-time platform engine. What about for desktop counterparts? Are my assumptions correct?