How To Add Menu Dynamically

protected void Page_Load(object sender,  EventArgs e)
{
  Menu myMenu = new  Menu();
  this.form1.Controls.Add(myMenu);
  MenuItem mnItem = new  MenuItem("test");
  myMenu.Items.Add(mnItem);
  myMenu.Orientation =  Orientation.Horizontal;
  //myMenu .Orientation = Orientation.Vertical;
}