Based on: https://stackoverflow.com/a/7764451/980530
Usage:
WindowsService /i WindowsService /u
WindowsService /i /servicename="WindowsService1" /displayname="Windows Service 1" WindowsService /u /servicename="WindowsService2"
installutil /servicename="WindowsService1" WindowsService.exe installutil /u /servicename="WindowsService1" WindowsService.exe