// test findPOItemByPOItemID
 protected void Button2_Click(object sender, EventArgs e)
 {
     using (PurchaseOrderManager pom = new PurchaseOrderManager())
     {
         PurchaseOrderItem item = pom.FindPurchaseOrderItemByID(Convert.ToInt32(TextBox2.Text.ToString()));
         item.QuantityToOrder = 80;
         PurchaseOrderItem itemUpdate = pom.UpdatePurchaseOrderItem(item);
     }
 }