title: can a worker thread read a control in the GUI?
body: <p>I got a thread running every few seconds fetching some data from a db
  but this is based on the selection on a listbox and on a few checkboxes...
  can I read the values of these controls without using the GUI thread?</p>
  
  <p>The data is also read whenever one of the controls change, but the data might change in db
  without warning...hence the thread running every few seconds. </p>
  
  <p>I'm working with wpf C#</p>