Tolmács kalandozás nyelvi csodák a nyaraláson

**1‑2‑3‑Model in C# – A 3‑D “Piano‑Box” Metaphor** *(a 2‑page (≈1 000 words) design description, plus a concise but functional C# implementation)* — ## 1. Why the 1‑2‑3‑Model? A *3‑D model* is simply a *hierarchical representation* of how we think about a…








