This dialog box enables you to add new items to the list control. The items you add through this
window are added as elements between the tags for the control.
4. Click the Add button on the left side of the screen to insert a new list item. Then in the Properties
Grid on the right, enter C# for the Text property and press Tab. As soon as you tab away from
the Text property, the value is copied to the Value property as well. This is convenient if you want
both the Text and the Value property to be the same. However, it’s perfectly OK (and quite common)
to assign a different value to the Value property.