How to access Visibility property of the ListBoxItems

Question

In my WPF program I have a ListBox control:

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Answer 1

Like this:

(mailsListBox.Items[1] as ListBoxItem).Visibility = Visibility.Visible;

Or you can use ItemContainerGenerator.ContainerFromItem method:

((ListBoxItem)(mailsListBox.ItemContainerGenerator.ContainerFromItem(mailsListBox.Items[1]))).Visibility = Visibility.Visible;