Quick Answer
Each middleware wraps the next one in the pipeline. If authentication middleware comes after routing, unauthenticated requests still hit the router. If static files middleware comes after routing, static files would fail to serve. Wrong order causes subtle bugs: put exception handling first, then HSTS, then routing, then authentication, then authorization.
Answer
Middleware executes in the exact order in which it is registered. Because each middleware can decide whether to pass control to the next component, incorrect ordering can break critical behaviors.
For example:
Exception-handling middleware must be early in the pipeline to catch downstream errors.
Authentication must run before authorization and MVC.
Static file middleware should run before MVC to avoid unnecessary controller execution.
ASP.NET Core does not automatically correct the order, so developers are responsible for composing the pipeline correctly.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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