public void Clear()
 {
     messages.Clear();
     MessagesUpdated?.Invoke(this, new EventArgs());
 }
 /// <summary>
 ///     refres the messages of a client
 /// </summary>
 /// <param name="focus">ClientIndentifier focus : the client</param>
 public void refreshMessages(ClientIdentifier focus)
 {
     this.focus = focus;
     MessageNotifier.Invoke(filter());
 }
 public void Add(string messge)
 {
     messages.Add(messge);
     MessagesUpdated?.Invoke(this, new EventArgs());
 }