How To Add Tool Tip for DropDownList items in Asp.Net

1<asp:DropDownList ID="DropDownList1" runat="server" ondatabound="DropDownList1_DataBound">

2</asp:DropDownList>

Code for .CS File

protected void DropDownList1_DataBound(object sender, EventArgs e)

02{

03    DropDownList ddl = sender as DropDownList;

04    if (ddl != null)

05    {

06        foreach (ListItem li in ddl.Items)

07        {

08           li.Attributes["title"] = li.Text; // setting text value of item as tooltip

09        }

10    }

11

12}