How To Create Menu Dynamically With Child Elements

protected void Page_Load(object sender,  EventArgs e)
{
  Menu myMenu = new  Menu();
  this.form1.Controls.Add(myMenu);
  MenuItem mnItem = new  MenuItem("Dyamnic Menu");
  myMenu.Items.Add(mnItem);

 
  MenuItem menuNodeChild = new MenuItem("Xploredotnet");
  mnItem.ChildItems.Add(menuNodeChild);
  menuNodeChild.NavigateUrl = "http://www.Xploredotnet.com";
  menuNodeChild = new MenuItem("ASP.NET");
  mnItem.ChildItems.Add(menuNodeChild);
  menuNodeChild.NavigateUrl = "http://www.asp.net";

 
  myMenu.Orientation =  Orientation.Horizontal;
  //myMenu .Orientation = Orientation.Vertical;
}