private void DeleteCriteria(DataListCommandEventArgs e)
        {
            var id = ((Label)e.Item.FindControl("lblId")).Text;

            var selectedItem = SelectedSearchFields.FirstOrDefault(o => o.Id == new Guid(id));

            SelectedSearchFields.Remove(selectedItem);
            dlSearchCriteria.DataSource = SelectedSearchFields;
            dlSearchCriteria.DataBind();
        }