Immutability and pure functions

Immutability refers to the property of an object whose state cannot be changed after it is created. In C#, this means that once an object is instantiated, its internal state, including the values of its properties, cannot be modified. Instead of modifying the existing object, any updates or modifications result in the creation of a new object with the updated values.

Immutability is commonly associated with functional programming in C# and has several benefits:

• Predictable behavior: Since immutable objects cannot change state, their behavior remains consistent throughout the program’s execution, making the code easier to reason about and debug.
• Thread safety: Immutable objects are inherently thread-safe since multiple threads cannot modify their state concurrently. This simplifies concurrent programming and reduces the risk of data corruption or race conditions.
• Caching and optimization: Immutability allows for caching and optimizing...