title: WPF ListView Update list items values after new item is added (values change with time)
body: <p>I have an app that responds to events and adds the data from the events to a "ListView", and I have a simple class that have 3 properties.</p>
  
  <p>ListView holds this data:</p>
  
  <pre><code>    public string Code { get; set; }
      public string Status { get; set; }
      public TimeAgo Time { get; set; }
  </code></pre>
  
  <p>class TimeAgo is:</p>
  
  <pre><code>public class TimeAgo
  {
  
      private DateTime _time;
  
      public TimeAgo(DateTime time) { _time = time; }
  
      public override string ToString()
      {
          return new TimeSpan(DateTime.Now.Ticks - _time.Ticks).Seconds + " seconds ago";
      }
  }
  </code></pre>
  
  <p>so, whenever a new event is happening I want the other objects to update, so if I add a new one it says "0 seconds ago" but the old ones should be updated and say "15 seconds ago" so I can track how long ago each event happened when it's updated.</p>
  
  <p>I've searched for methods for this, but all I've tried haven't worked.</p>
  
  <p>Any ideas?</p>