/// <summary>
 /// Remove a listener.
 /// </summary>
 /// <param name="listener">The listener to remove.</param>
 public void RemoveListener(IIndicatorConnectionListener listener)
 {
     _listeners.Remove(listener);
 }
 /// <summary>
 /// Remove a listener.
 /// </summary>
 /// <param name="listener">The listener to remove.</param>
 public void RemoveListener(IIndicatorConnectionListener listener)
 {
     _listeners.Remove(listener);
 }
 /// <summary>
 /// Add a listener. 
 /// </summary>
 /// <param name="listener">The listener to add.</param>
 public void AddListener(IIndicatorConnectionListener listener)
 {
     _listeners.Add(listener);
 }
 /// <summary>
 /// Add a listener.
 /// </summary>
 /// <param name="listener">The listener to add.</param>
 public void AddListener(IIndicatorConnectionListener listener)
 {
     _listeners.Add(listener);
 }