// The path to the documents directory.
string dataDir = RunExamples.GetDataDir_Pages();

// Create an object of the Document class
Document doc = new Document();
// Initialize Page class object and set its level
Aspose.Note.Page page1 = new Aspose.Note.Page(doc) { Level = 1 };
// Initialize Page class object and set its level
Aspose.Note.Page page2 = new Aspose.Note.Page(doc) { Level = 2 };
// Initialize Page class object and set its level
Aspose.Note.Page page3 = new Aspose.Note.Page(doc) { Level = 1 };

/*---------- Adding nodes to first Page ----------*/
Outline outline = new Outline(doc);
OutlineElement outlineElem = new OutlineElement(doc);
ParagraphStyle textStyle = new ParagraphStyle { FontColor = Color.Black, FontName = "Arial", FontSize = 10 };
RichText text = new RichText(doc) { Text = "First page.", ParagraphStyle = textStyle };
outlineElem.AppendChildLast(text);
outline.AppendChildLast(outlineElem);
page1.AppendChildLast(outline);

/*---------- Adding nodes to second Page ----------*/
var outline2 = new Outline(doc);
var outlineElem2 = new OutlineElement(doc);
var textStyle2 = new ParagraphStyle { FontColor = Color.Black, FontName = "Arial", FontSize = 10 };
var text2 = new RichText(doc) { Text = "Second page.", ParagraphStyle = textStyle2 };
outlineElem2.AppendChildLast(text2);
outline2.AppendChildLast(outlineElem2);
page2.AppendChildLast(outline2);

/*---------- Adding nodes to third Page ----------*/
var outline3 = new Outline(doc);
var outlineElem3 = new OutlineElement(doc);
var textStyle3 = new ParagraphStyle { FontColor = Color.Black, FontName = "Arial", FontSize = 10 };
var text3 = new RichText(doc) { Text = "Third page.", ParagraphStyle = textStyle3 };
outlineElem3.AppendChildLast(text3);
outline3.AppendChildLast(outlineElem3);
page3.AppendChildLast(outline3);

/*---------- Add pages to the OneNote Document ----------*/
doc.AppendChildLast(page1);
doc.AppendChildLast(page2);
doc.AppendChildLast(page3);

dataDir = dataDir + "CreateDocWithRootAndSubPages_out.one";
// Save OneNote document
doc.Save(dataDir);