private void _parent_ConversationMemberRemoved(object sender, ConversationMemberRemovedEventArgs e) { ConversationList.SelectedConversation.OnDataChanged(); if (ConversationList.SelectedConversation.Id == e.ConversationId) { PersonModel person = _parent.Persons.Find(obj => obj.Id == e.PersonId); MemberList.RemoveMemberFromList(person); if (MemberList.Members.Count == 1) { if (_newEmailButton != null) { _newEmailButton.Visibility = Visibility.Collapsed; _newPhoneButton.Visibility = Visibility.Collapsed; } } } }