Overview of functional programming in C#

Functional programming in C# is a programming paradigm that emphasizes writing code in a declarative and immutable manner, treating computation as the evaluation of mathematical functions. In this approach, functions are first-class citizens, which means they can be assigned to variables, passed as arguments to other functions, and returned as results from functions. The central idea is to model computations as the composition of pure functions, where the output solely depends on the input, without any side effects or mutable state.

Here are some key characteristics of functional programming in C#:

• Immutability: In functional programming, data is treated as immutable, meaning once created, it cannot be changed. Instead of modifying existing data, functional programs create new data with updated values, which helps in maintaining a more predictable and reliable state.
• Pure functions: Pure functions are functions that produce the...