To clear a list of all values the syntax is:
A)myListBox.Items.Clear()
B)myListBox.Items.DeleteItem.All()
C)myListBox.Clear()
D)myListBox.Items.DeleteAll()

Question

Quizplus · Accepted Answer

The syntax myListBox.Items.Clear() is the correct way to clear all values from a ListBox control in C#. This method will remove all items from the ListBox, leaving it empty. The other options (B, C, and D) are not valid syntax and will not work for this purpose.

To Clear a List of All Values the Syntax Is