[WebMethod]
public List<string> FetchItems() {
        DataSet dsItems = new DataSet();
        dsItems.ReadXml(HttpContext.Current.Request.PhysicalApplicationPath + @"Items.xml");
        List<string> items = new List<string>();
        foreach (DataRow dr in dsItems.Tables["Item"].Rows)
        {
            string name = dr["Name"].ToString();
            items.Add(name);
        }
        return items;
    }
