![c# - CS1617: Invalid option '6' for /langversion; must be ISO-1, ISO-2, 3, 4, 5 or Default - Stack Overflow c# - CS1617: Invalid option '6' for /langversion; must be ISO-1, ISO-2, 3, 4, 5 or Default - Stack Overflow](https://i.stack.imgur.com/EFqOv.jpg?s=64&g=1)
c# - CS1617: Invalid option '6' for /langversion; must be ISO-1, ISO-2, 3, 4, 5 or Default - Stack Overflow
Quando si tenta di aprire o modificare un modello in Revit, viene visualizzato il messaggio di errore "Impossibile modificare l'elemento finché [Nome utente] non salva di nuovo..." | BIM 360 | Autodesk
Revit 2014 - Problem installing Update 1 - Autodesk Community - Subscription, Installation and Licensing
![c# - CS1617: Invalid option '6' for /langversion; must be ISO-1, ISO-2, 3, 4, 5 or Default - Stack Overflow c# - CS1617: Invalid option '6' for /langversion; must be ISO-1, ISO-2, 3, 4, 5 or Default - Stack Overflow](https://i.stack.imgur.com/w6RzW.jpg?s=64&g=1)