// Proceed to use licensed features // e.g., Document.SaveAsPDF();
Once this key is set, the application can validate it against an internal algorithm or a remote server, unlocking the corresponding features. licenseinfo.setlicensekey
throw new InvalidOperationException("License key not found in environment."); // Proceed to use licensed features // e
may trigger an "expired" warning even if the key is valid for older versions. Once this key is set