private void buttonLeave_Click(object sender, RoutedEventArgs e)
 {
     _chatManager.OnOnLog($"{_user.Username} left chat");
     _chatManager.OnOnUserNumberChanged(_chatManager.GetActiveUsers() - 1);
     _chatManager.RemoveUser(_user);
     buttonJoin.IsEnabled  = true;
     buttonLeave.IsEnabled = false;
 }
        private void buttonLeave_Click(object sender, RoutedEventArgs e)
        {
            _chatManager.log($"{_user.Username} leaved chat");
            _chatManager.userNumberChanged(_chatManager._activeUsers.Count - 1);

            _chatManager.RemoveUser(_user);
            buttonJoin.IsEnabled  = true;
            buttonLeave.IsEnabled = false;
        }
 private void buttonLeave_Click(object sender, RoutedEventArgs e)
 {
     _chatManager.RemoveUser(_user);
     buttonJoin.IsEnabled  = true;
     buttonLeave.IsEnabled = false;
 }