Functional Programming in C#: How to write better C# code by Enrico Buonanno

Inverted chapter dependency graph
Chapter 1
• Functional programming tenets
• Functional features in C#
• Higher-order functions
Chapter 2
• Function purity and side effects
• Purity and concurrency
• Purity and testability
Chapter 3
• Function signatures: notation and design
• Designing types
• The Option type
Chapter 4
• The core functions: Map,
Bind, ForEach, Where
• Regular vs. elevated types
Chapter 5
• Function composition
• Encoding workflows
• An end-to-end workflow
Chapter 6
• Functional error handling
• Representing outcomes with Either
• The Exceptional and Validation types
Chapter 7
• Partial application and currying
• Modularizing and composing an app
• The Aggregate function
Chapter 8
• Multi-argument functions with elevated types
• The Apply function
• The LINQ query pattern
Chapter 9
• State, identity, and change
• Immutable types
• Immutable data structures
Chapter 10
• Immutable, append-only persistence
• Event-sourcing concepts
• Event-sourcing architecture
Chapter 11
• Lazy computations
• Composing functions monadically
• Continuations
Chapter 12
• Stateful programs
• Stateful computations
• Generating random data
Chapter 13
• Asynchronous computations
• The Traverse function
• Combining different monadic effects
Chapter 14
• Data streams and IObservable
• Creating and transforming streams
Chapter 15 • Stateful programs
• The need for shared mutable state
• Message-passing concurrency
• Conventional APIs, agent-based implementations