I spent an exciting part of today debugging a service which was failing in production, but not in any demo, UAT or dev installations. In doing so, I discovered one of those architectures which requires me to go and make a cup of tea in order to distract my hands

Take a look at this class: public class ThingHandler : IThingHandler { private readonly IUnderlyingThingHandler _underlyingThingHandler; public ThingHandler(IUnderlyingThingHandler underlyingThingHandler) { _underlyingThingHandler = underlyingThingHandler; } public Thing GetThing(int parameter) { return _underlyingThingHandler.GetThing(parameter); } } I've seen variants of this everywhere I've worked. Sometimes it doesn't have the dependency injected,