Explore the concept of Dependency Injection and its evolution in software development in this 54-minute conference talk. Delve into the intersection of Dependency Injection and functional programming, examining their contrasting approaches to managing non-deterministic behavior. Learn alternative techniques and discover how functional solutions can be applied to object-oriented programming. Follow along with code examples primarily in C#, while also encountering concepts from lambda calculus, Greek terminology, Haskell, F#, and monads. Gain insights into topics such as Reservation Repository, Accepting a Reservation, Discrimination Union, Pure Functions, Refactoring, Isomorphism, and Query syntax. Enhance your understanding of modern software development practices and their practical applications.