C#

<br />
    public class Book<br />
    {<br />
        public List<page> Pages { get; set; }<br />
        public string Title { get; set; }<br />
    }<br />
    public class Page<br />
    {<br />
        public Book ParentBook {get;set}<br />
        public List<chapter> Chapters { get; set; }<br />
        public int PageNo { get; set; }<br />
        public Page(Book parent)<br />
        {<br />
            ParentBook = parent;<br />
        }<br />
    }<br />
    public class Chapter<br />
    {<br />
        public Page ParentPage { get; set; }<br />
        public string Heading { get; set; }<br />
        public string Content { get; set; }<br />
        public Chapter (Page parent)<br />
        {<br />
            ParentPage = parent;<br />
        }<br />
    }<br />
</chapter></page>

<br />
Book b = new Book() { Title = "My Book" };<br />
Page p = new Page(b) { PageNo = 1 };<br />
Chapter c = new Chapter(p) { Heading = "Introduction" };<br />
<br />
RenderChapterNavigation(c);<br />
<br />
private static void RenderChapterNavigation(Chapter c)<br />
{<br />
  if (c.ParentPage.Chapters.Count == 0)<br />
  {<br />
    RenderNoChaptersLink();<br />
  }else{<br />
    RenderChapters(c);<br />
  }<br />
}<br />

// Request.Files[i].SaveAs(fileName_save);

using (FileStream fs = new FileStream(fileName_save, FileMode.Create))
{
    byte[] bytes = new byte[Request.Files[i].InputStream.Length];
    Request.Files[i].InputStream.Read(bytes, 0, (int)Request.Files[i].InputStream.Length);
    fs.Write(bytes, 0, bytes.Length);
    fs.Close();
}