// This code creates documentFolder containing document.html, css folder with style.css file, images folder with images and fonts folder with fonts.
// style.css file will contains at the end the following string "/* This line is appended to stream manually by user */"
var options = new HtmlSaveOptions()
{
    FontFaceTypes = FontFaceType.Ttf
};
var savingCallbacks = new UserSavingCallbacks()
{
    RootFolder = "documentFolder",
    CssFolder = "css",
    KeepCssStreamOpened = true,
    ImagesFolder = "images",
    FontsFolder = "fonts"
};
options.CssSavingCallback = savingCallbacks;
options.FontSavingCallback = savingCallbacks;
options.ImageSavingCallback = savingCallbacks;

if (!Directory.Exists(savingCallbacks.RootFolder))
{
    Directory.CreateDirectory(savingCallbacks.RootFolder);
}

string dataDir = RunExamples.GetDataDir_LoadingAndSaving();
var document = new Aspose.Note.Document(dataDir + "Aspose.one");

using (var stream = File.Create(Path.Combine(savingCallbacks.RootFolder, "document.html")))
{
    document.Save(stream, options);
}

using (var writer = new StreamWriter(savingCallbacks.CssStream))
{
    writer.WriteLine();
    writer.WriteLine("/* This line is appended to stream manually by user */");
}