title: Linking ObservableCollection and a List<T>
body: <p>I am new to databinding in WPF and could use a little help.</p>
  
  <p>A have a regular class that has a List member.  I need to show a ListBox that contains all of those items and updates whenever an item is added to that member.</p>
  
  <p>What is the right process for me to do that?
  I have tried binding my ListBox to an ObservableCollection.  This kind of works because whenever I add something to my ObservableCollection, the listbox updates, however, those adds are not persisted down to the List.  How do I "bind" an ObservableCollection to a list so that when I add something to the ObservableCollection, I am really adding it to the list?</p>
  
  <p>Thanks in advance!</p>