Populating all data to an xml file from sql server

List<SelectListItem> UniversityType = new List<SelectListItem>();

            conCheck();

           

           

            SqlCommand cmd = new SqlCommand();

            cmd.Connection = sqlcon;

            cmd.CommandType = CommandType.StoredProcedure;

            cmd.CommandText = "insertUniversityType";

            cmd.Parameters.AddWithValue("@type", univType);

            //cmd.ExecuteNonQuery();

            SqlDataAdapter da = new SqlDataAdapter(cmd);

            DataSet dt = new DataSet();

            da.Fill(dt);

            sqlcon.Close();

           

            //---------populating xml

            string XMLFile1 =HttpContext.Current.Server.MapPath("~/XMLFiles/UniversityType.xml");

            dt.WriteXml(XMLFile1, XmlWriteMode.IgnoreSchema);

            //----------------------