Finished Day 11 of the #AdventOfCode in #FunctionalCSharp. They said it was insane, but I did it and they were _right_. I had to create a custom dictionary class with an added extension method, and do some fairly crazy recursion, but by 'eck I did it.

https://github.com/madSimonJ/FunctionalProgrammingWithCSharp/blob/main/AdventOfCode/AdventOfCode/2024/Day11.cs