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How does ASP.NET Core handle static files and why is the middleware special?

Mid .NET Core
Quick Answer UseStaticFiles() middleware intercepts requests matching files in wwwroot (CSS, JS, images) before routing. It serves them directly with appropriate Content-Type and ETag/Cache-Control headers. It must come before UseRouting() and before any auth middleware รขโ‚ฌโ€ static assets are public and should be served without auth checks.

Answer

Static Files Middleware serves files directly from wwwroot with no MVC involvement, improving performance. Must be placed early to avoid being processed by routing or MVC.

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Source: SugharaIQ

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