Chain of Responsibility

Passes a request along a chain of handlers (Level1Support → Level2Support → Level3Support) until one of them handles it, without the caller needing to know which one will.

Use it when: more than one object may handle a request and the handler isn't known ahead of time (support ticket escalation, middleware pipelines, validation chains).

Watch out: if no handler in the chain ends up handling the request, it can silently disappear — make sure there's always a terminal handler (here, Level3Support always handles what reaches it).

Run

dotnet run --project ChainOfResponsibilityPattern