using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
//U have to use System.XML namespace for reading data from xml file.
using System.Xml;
public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {
        DataSet ds = new DataSet();
'ReadXL will read the data from the specific xml file
        ds.ReadXml(Server.MapPath("XMLFile.xml"));
        DropDownList1.DataSource=ds;

        DropDownList1.DataTextField="Name";
        DropDownList1.DataValueField="Name";
        DropDownList1.DataBind();
    }
}