void picker_EditingDidEnd(object sender, EventArgs e)
        {
            FlexGrid     g      = (FlexGrid)View.ViewWithTag(1);
            UITextField  editor = (UITextField)g.ActiveEditor;
            UIDatePicker picker = (UIDatePicker)editor.InputView;

            g.Cells.SetCellData(picker.Date, g.EditRange.Row, g.EditRange.Col);
            g.FinishEditing(true);
        }
        void OnDateSet(object sender, DatePickerDialog.DateSetEventArgs e)
        {
            Customer customer = (Customer)editRow.DataItem;

            customer.Hired = e.Date;

            FlexGrid.FinishEditing(false);
            FlexGrid.Refresh(false);
        }