One careless thread, and your application can spiral into chaos. Race conditions, corrupted state, and performance bottlenecks are all too common when multiple threads touch shared resources without control. C# gives us several synchronization primitives, but when it comes to asynchronous, high-performance scenarios, 𝐒𝐞𝐦𝐚𝐩𝐡𝐨𝐫𝐞𝐒𝐥𝐢𝐦 stands out: ↳ lock • Easy to use • Limited to a single process ↳ Semaphore • Allows multiple concurrent threads • Powerful but heavyweight ↳ 𝐒𝐞𝐦𝐚𝐩𝐡𝐨𝐫𝐞𝐒𝐥𝐢𝐦 ⚡ •...