Sure. Now automate the creation of that solution, and it's just a cache.

I did the other way, because I liked how it looked.

But yours surely looks way, waaay better. Well done fella!

question is not an issue

Inputs for the Kata will always be valid.

This guy walks into the office and take my job away. 👍

This is one of the more easily understood solutions even without comments to help understand the code. A double for loop is such a straight forward way of expressing the core concept of the sequence. Great job!

I think mine is better. in case if the line is null. -
line + "" == string.Concat((line + "").Reverse())

I felt so dumb when I saw that xD

Clean and performant!
Even which direction the indices go (increase or decrease) is decided smartly to have a readable code.
I really love the little details (but really impactful) which others care.
Nice man!

good sign

fixed after 5 years by adding fixed tests for 0 ~~

it's okay about zero

Hahahahah so funny 🤣

Wow, it's totallu 8kyu. It's basic array method.