//add item to Order
private void btn_TableItem_Click(object sender, EventArgs e)
{
Button b = sender as Button;
if (b == null)
{
return;
}
TableSizeQtty tableSizeQtty = new TableSizeQtty((int)b.Tag);
tableSizeQtty.FormClosing += tableSizeQttyClosing;
tableSizeQtty.ShowDialog();
}
