title: WPF open a new window without closing the original window
body: <p>I am trying to develop a software that requires the user to change windows a lot. Instead of opening a new window as a separate entity, I want the new window to replace the old window.</p>
  
  <p>Currently I have this going...</p>
  
  <pre><code>Window Jobs_Window = new Jobs();
  Jobs_Window.Show();
  this.Close();
  </code></pre>
  
  <p>But that opens a new window and closes the old one, which looks messy. </p>
  
  <p>What do I need to do to replace the contents of window 1 with contents of window 2?</p>