C# provides function types to fit a variety of scenarios, called delegates, events, and lambda functions. In this course, Joe Marini explores these key elements, starting with delegates, which allow developers to easily separate functional pieces of a program. Joe shows how to create both anonymous and composable delegates, using a shipping costs calculator as a practical example. Next, he covers using events to broadcast and listen to messages both inside and outside a program, switching functionality on and off on demand. Finally, the course explores lambda functions: concise ways to declare small and focused or one-off functions, which keep your program code tight and efficient.