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Explains minimal APIs, endpoint groups, dependency injection, typed results, filters, and when they fit real services.
Introduces lower-level allocation tools while emphasizing measurement, ownership, and safe usage.
Explains returning EF entities from APIs with practical .NET data-access examples and production trade-offs.
Covers the Large Object Heap, big buffers, fragmentation pressure, and practical ways to avoid loading too much at once.
Explains how middleware order affects authentication, authorization, error handling, routing, CORS, and response behavior.
Explains cache memory growth, eviction, size limits, stale data, and why cache design needs explicit bounds.
Reviews a captive scoped dependency as both a lifetime and concurrency bug, then replaces it with explicit per-operation scopes and minimal immutable work data.
Diagnoses lost struct mutations and explains how readonly access can trigger defensive copies.
Explains local filesystem limits, multiple instances, in-memory state, distributed cache, durable storage, and scale-out-safe API design.