Functional Programming in C# : How to Write Better C# Code

**Summary** __Functional Programming in C#__ teaches you to apply functional thinking to real-world problems using the C# language. The book, with its many practical examples, is written for proficient C# programmers with no prior FP experience. It will give you an awesome new perspective. Purchase of the print book includes a free eBook in PDF, Kindle, and ePub formats from Manning Publications. **About the Technology** Functional programming changes the way you think about code. For C# developers, FP techniques can greatly improve state management, concurrency, event handling, and long-term code maintenance. And C# offers the flexibility that allows you to benefit fully from the application of functional techniques. This book gives you the awesome power of a new perspective. **About the Book** __Functional Programming in C#__ teaches you to apply functional thinking to real-world problems using the C# language. You'll start by learning the principles of functional programming and the language features that allow you to program functionally. As you explore the many practical examples, you'll learn the power of function composition, data flow programming, immutable data structures, and monadic composition with LINQ. **What's Inside** * Write readable, team-friendly code * Master async and data streams * Radically improve error handling * Event sourcing and other FP patterns **About the Reader** Written for proficient C# programmers with no prior FP experience. **About the Author** **Enrico Buonanno** studied computer science at Columbia University and has 15 years of experience as a developer, architect, and trainer. **Table of Contents** PART 1 - CORE CONCEPTS2. Introducing functional programming 3. Why function purity matters 4. Designing function signatures and types 5. Patterns in functional programming 6. Designing programs with function composition PART 2 - BECOMING FUNCTIONAL8. Functional error handling 9. Structuring an application with functions 10. Working effectively with multi-argument functions 11. Thinking about data functionally 12. Event sourcing: a functional approach to persistence PART 3 - ADVANCED TECHNIQUES14. Lazy computations, continuations, and the beauty of monadic composition 15. Stateful programs and stateful computations 16. Working with asynchronous computations 17. Data streams and the Reactive Extensions 18. An introduction to message-passing concurrency Functional programming is a way of thinking about programs that emphasizes functions, while avoiding state mutation. It allows us to write elegant, intention-revealing code, that shines in testability and support for concurrency. C# includes a number of functional features and libraries, enabling us to take advantage of these benefits. Functional Programming in C# teaches you to apply functional thinking to real-world scenarios. Youll start by learning the principles of functional programming, and how they translate in the C# language. The book then dives into important topics like function composition, data flow, and principles for designing function signatures, types and collections. Through lots of real-world examples, youll acquire the tools to tackle programming tasks with a functional approach. The last part of the book deals with advanced topics, including lazy evaluation, stateful computations, asynchrony, and event streams. By the end of this book, youll be able to integrate functional techniques, making your C# programs robust and maintainable, and helping you become a more well-rounded developer.