Explore functional programming techniques in C# through this comprehensive 58-minute conference talk. Learn how to transform imperative, object-oriented code into more concise, understandable, and robust functional implementations. Discover the benefits of immutability, tail-call recursion, and higher-order functions while leveraging delegates, lambda expressions, base classes, and generics. Gain practical insights on when and how to apply functional approaches to improve code quality, consistency, and maintainability. Master concepts such as referential transparency, purity, and control flow in the context of C# programming. Dive into real-world examples, including refactoring strategies, conditional logging, and effective use of using statements. By the end of this talk, acquire the skills to implement functional techniques in C# 3 and above, enhancing your ability to write cleaner, more efficient code.