C# treeview and Text

Question

Hey there

I have a minor problem with my program.  I allow the user to select an item from the combobox and enter a quantity. Now provided that the user selected the proper parent node and child node the quantity is supposed to be placed right beside the checked child node. When the user unchecks it, its supposed to disappear, if they want to switch the quantity while still being checked they are allowed to as well, how would I go about doing this?