ONE Leave feedback On this page FileType.ONE field See Also FileType.ONE field OneNote Document (.one) is created by Microsoft OneNote application. OneNote lets you gather information using the application as if you are using your draftpad for taking notes. Learn more about this file format here. public static readonly FileType ONE; See Also class FileType namespace GroupDocs.Viewer assembly GroupDocs.Viewer Was this page helpful? Not really Yes, thanks Any additional feedback you'd like to share with us? Skip Send Please tell us how we can improve this page. Skip Send Thank you for your feedback! We value your opinion. Your feedback will help us improve our documentation.