C# Quick fix

SOLVED: It's one class but it is to long to write in a codeblock.

It throws an error in the last line //The name 'balance' does not exist in the current context

I have no clue why, cause it's identical with the other code I wrote.

I can sit and stare in the computer for half an hour more trying to solve it, but I think it's a minor typo or something that I'm blind to.

codepile