.NET

The cheat sheet++ — how .NET works, from language basics to infrastructure.

C# Language

What the compiler actually generates for a record, when to reach for one, and where value equality bites back.

Every C# pattern kind in one place — switch expressions, property patterns, list patterns — and what they compile to.

Generations, the LOH, server vs workstation GC — how the collector thinks, and how to stay out of its way.

The state machine the compiler writes for you — and the deadlocks, allocations and rules that follow from it.

Expected failures as values instead of exceptions — a hand-rolled Result<T>, when to use it, and when not to.

Layering cross-cutting behavior — logging, caching, retries — around a service without touching its code.

Singleton, scoped, transient — what actually happens per request, and the captive-dependency bug that ignores all three.

ASP.NET Core is a Russian doll of RequestDelegates — how the pipeline is built, why order matters, and where things belong.

Code coverage tells you a line ran; mutation testing tells you a test would notice if it broke.

Turn XML doc comments plus markdown into a versioned, deployable documentation site.