CSharp-Coder

Learn test-driven development in C# with xUnit and Moq. Step-by-step TDD tutorial with runnable code, best practices, and pitfalls. Start writing tests first today. Test driven development in C# flips the usual workflow on its head: you write a failing test first, then write just enough production code to make it pass, then clean up. It sounds slow. In practice, teams that adopt TDD with xUnit and Moq ship fewer bugs, refactor with confidence, and end up with a design that is naturally decoupled and testable. This guide walks you through the full red-green-refactor cycle in .NET, with runnable examples, mocking with Moq, and the mistakes that trip up most developers when they first try TDD. What Is Test Driven Development in C#? TDD is a development discipline with three short, repeating steps: Red – write a small test that describes behaviour you want. Run it. It fails (often it doesn't even compile). Green – write the simplest production code that makes the test ...