I blame the precompiler for not being allowed to do this :D

Nope c# still works incorrectly. -8, -8, 65 expected 0 instead of -8.

Solution presented in c# is wrong. Please fix it.

I did the exact same thing when running through this exercise.
"coming from s1 or s2" is incorrect in the context used, as it implies the strings are to remain separate and then compared for length.
"coming from s1 and s2" correctly implies the strings must first be concatenated, as is expected in the tests.

I tried with a solution but same as you... I saw your report of this bug, good.

Which issue did you resolve?! Cannot read your link (error 400). 50 guys passed this kata in Clojure. If necessary report as a Codewars bug: https://github.com/Codewars/codewars.com/issues.

Ah you're right. I editted the solution a bit and forgot to take out.

if (number == 99 || number == 98)return 1;

It should work if this is removed.

It contains error. It doesn't work for 99 and 98.