Invalid token 'while' in class, struct, or interface member declaration in very simple code

Question

I am not sure what the problem is but I keep receiving this error when I try to use a while statement in my code.

Invalid token \'while\' in class,

Answer 1

Based on the error, it sounds like the compiler thinks this code is typed directly in the body of a class/struct/interface declaration. Statements while/if/for/etc ... must appear with in a method.

Try moving this code into a method to fix the problem. If it's in a method, you likely have a mismatched brace problem.