WPF Listbox Items

WPF Listbox Items

Good Day,
I have a ListBox control that contains the names of files inside a directory.
How would I iterate though the controls and get those names? I've tried:
for (int i = 0; i < listboxFileGroups.Items.Count; i++)
{
// I don't want to use properties that start with Selected
// Here is what I was looking for
string textItem = listboxFileGroups.Items[i].ToString();
}
Any suggestions?
TIA,
coson