Writing code without unit tests can be risky—you might not realize issues until it’s too late. Unit testing helps make sure your code actually does what it's supposed to. In this post, we’ll break down unit testing in C# using NUnit and explore how Test-Driven Development (TDD) can make your life easier. What’s Unit Testing Anyway? Unit testing is all about testing small, isolated chunks of your code to make sure they work correctly. Instead of waiting until the whole application is built and then scrambling to fix bugs, unit tests let you catch issues early. In C#, we typically use frameworks like NUnit , xUnit , or MSTest to write and run these tests. Why Should You Care About Unit Testing? Find Bugs Early: Fixing issues sooner rather than later saves time (and headaches). Make Your Code More Maintainable: Well-tested code is easier to update and improve. Write Better Code: Writing testable code forces you to structure it well. Acts as Documentation: Your tests describe what...