How can we leverage state when working with MediatR? The popular nuget package, MediatR, does not have stateful handlers by default. This means that when handling a message, a new instance of the handler is created. While this isn't a problem on its own, in fact, I'm sure it's a very conscious design decision... We may have situations where we'd at least like SOME kind of state. What happens if you want to have some type of caching mechanism, for example? The easy solution is to give the respons