title: Get listbox SelectedItem string when using Display/Value Member
body: <p>I populated my listbox using display and value members. I know how to access the value of Id (e.g 134) but i would like somehow to take also item string which i can see on my listbox when i select it. How to access Display member value?</p>
  
  <pre><code>MyListBox.DisplayMember = "PicturePath"
  MyListBox.ValueMember = "Id"
  MyListBox.DataSource = GetElementPics.ListPicsByElementId
  </code></pre>