Using middleware for logging or performance (e.g. measuring execution time) Example custom middleware to measure time: public class TimingMiddleware { private readonly RequestDelegate _next; public TimingMiddleware(RequestDelegate next) => _next = next; public async Task InvokeAsync(HttpContext context) { var sw = Stopwatch.StartNew();

Short answer: wait _next(context); sw.Stop(); Console.WriteLine($"Request took {sw.ElapsedMilliseconds} ms"); } } Register: pp.UseMiddleware<TimingMiddleware>(); Dependency Injection (DI) wait _next(context); sw.Stop(); Console.WriteLine($"Request took {sw.ElapsedMilliseconds} ms"); } } Register: pp.UseMiddleware<TimingMiddleware>(); Dependency… Injection (DI) wait… _next(context); sw.Stop(); Console.WriteLine($"Request took…

Explain a bit more

{sw.ElapsedMilliseconds} ms"); } } Register: pp.UseMiddleware<TimingMiddleware>(); Dependency Injection (DI) wait _next(context); sw.Stop(); Console.WriteLine($"Request took {sw.ElapsedMilliseconds} ms"); } } Register: pp.UseMiddleware<TimingMiddleware>(); Dependency… Injection (DI)

Real-world example (ShopNest)

ShopNest pipeline order matters: exception handling → HTTPS → auth → authorization → endpoints. Auth must run before protected APIs.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.