namespace TreeViewQuickStart

{

    public partial class MainPage : UserControl

    {

        public MainPage()

        {

            InitializeComponent();

            InitializeTreeView();

        }

       void InitializeTreeView()

       {

            // 設計時に追加された項目を削除します

            Tree.Items.Clear();

            C1TreeViewItem booklist = new C1TreeViewItem();

            booklist.Header = "Book List";

           Tree.Items.Add(booklist);

           // 子項目を追加します

          C1TreeViewItem language = new C1TreeViewItem();

          language.Header = "Language Books";

          booklist.Items.Add( language );

         // 子項目を追加します

         C1TreeViewItem security = new C1TreeViewItem();

         security.Header = "Security Books";

         booklist.Items.Add(security);

        // 子項目を追加します

        C1TreeViewItem classic = new C1TreeViewItem();

        classic.Header = "Classic Books";

        booklist.Items.Add(classic);

       // 子項目を追加します

       C1TreeViewItem subclassic = new C1TreeViewItem();

       subclassic.Header = "Catch-22";

       classic.Items.Add(subclassic);

       C1TreeViewItem subclassic2 = new C1TreeViewItem();

       subclassic2.Header = "The Great Gatsby";

       classic.Items.Add(subclassic2);       

}   

    }

}