Over time, even well-intentioned codebases tend to rot. Tests become brittle, refactoring feels risky, and architectural decisions made “for now” quietly lock teams into long-term pain. Many experienced developers know the theory — TDD, SOLID, clean architecture — yet still struggle to apply it effectively at scale.

In this full-day workshop, you’ll learn a pragmatic, experience-driven approach to designing and evolving maintainable, testable systems. Based on more than 30 years of professional development experience and 15 years of hands-on TDD practice, this workshop focuses on what actually works — and just as importantly, what doesn’t.

We’ll explore:
- How different architectural styles influence coupling, cohesion, and testability
- Why common interpretations of SOLID and DRY often backfire in real systems
- Practical techniques for untangling legacy codebases safely
- Designing code that is testable by construction, not by accident
- Writing effective automated tests without over-specifying behavior
- A realistic, non-dogmatic approach to Test-Driven Development

The workshop is highly practical, combining short lectures with hands-on exercises and live coding. All examples are in
C#, but the principles and techniques apply equally to any object-oriented language or platform.

After attending this workshop, you’ll have a clearer mental model for architectural trade-offs, stronger instincts for maintainable design, and concrete techniques you can apply immediately in large, long-lived codebases.