Line at the top of the .CS file

you stated in your instructions that //Requires NextGenPVE needs to go into the top of the file, can you give me an exact example? Everytime i put it in there it throws a syntax error on the lines. 

Refer to the first line:               

//Requires: ZoneManager
//Requires: ZoneManager
//Requires: NextGenPVE

using System;