C# Arrays Mental Model — From numbers[0] to LLM‑Ready Code


Most C# developers use arrays every day:



int[] numbers = [5, 10, 15, 20];
Console.WriteLine(numbers[0]);






But when you start going deeper—JIT, CPU caches, bounds checks, Span<T>, indices (^) and ranges (..)—suddenly arrays stop being “just a beginner topic” and become a...