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//For complete examples and data files, please go to https://github.com/groupdocsmetadata/GroupDocs_Metadata_NET
// initialize TiffFormat
TiffFormat tiffFormat = new TiffFormat(Common.MapSourceFilePath(filePath));

// get EXIF data
ExifInfo exif = tiffFormat.GetExifInfo();
                   
exif.UserComment = "New User Comment";
exif.BodySerialNumber = "New Body Serial Number";
exif.CameraOwnerName = "New Camera Owner Name";

// update Exif info
tiffFormat.UpdateExifInfo(exif);

// commit changes and save output file
tiffFormat.Save(Common.MapDestinationFilePath(filePath));