hello. i have problem with c# multiple form app. in my first form i have a combo box, a list, a text box and an add item button. in the combo box i have a list of products. once i choose a product from combo box and enter the quantity in the text box, it will show up on my list. but if i click on an empty string from combo box such as "" and click on add item, it will take me to a subform where i can put in the specifications of the product. in the second form i have the product name and other specifications. i also have an update button when the name of the product in the second form's text box is entered and update button is clicked, it should upload the name of the product to the first form's combo box.