Practical Port Probing: Build a Fast and Safe TCP Port Scanner in C#

TL-DR - This guide teaches you how to build a fast and safe TCP port scanner in C#. You’ll learn how port scanning works, why it matters in cybersecurity, and how to implement timeouts, concurrency limits, and async scanning. You’ll also get an improved version with banner grabbing and JSON export. Perfect for developers, students, and security beginner…