How to achieve sustainable development? How to prevent development cycle from slowing down, scope from exploding in size and code-base from reaching unmanageable complexity? We'll take a look at unit testing in general and TDD specifically as tools for managing software in its entire lifecycle: from early development to post-deploy maintenance. C# samples included! Our agenda: * What are unit tests? * Benefits of unit testing (first, metrics, testability, extensibility, test driven development) * What is readable code * Benefits of readable code (solid, maintainability) * C# examples (new features and old bugs) * Overview of helpful Tools (NCrunch, ReSharper)