public void PetTrackerRemove()
        {
            var findTrackerWindow = new FindTracker();

            if (findTrackerWindow.ShowDialog() == true)
            {
                if (findTrackerWindow.uxNumber.Text != "")
                {
                    FindNumber = Convert.ToInt32(findTrackerWindow.uxNumber.Text);

                    var selectedRepositoryModel = App.PetTrackerRepository.GetAll().Find(t => t.Number == FindNumber);

                    if (selectedRepositoryModel == null)
                    {
                        MessageBox.Show("Can't find this record.");
                    }
                    else if (selectedRepositoryModel != null)
                    {
                        var selectedModel    = PetTrackerModel.ToModel(selectedRepositoryModel);
                        var petTrackerWindow = new UpdatePetTracker();
                        petTrackerWindow.uxSubmit.Content = "Delete";

                        petTrackerWindow.PetTrackerModel = selectedModel;

                        if (petTrackerWindow.ShowDialog() == true)
                        {
                            App.PetTrackerRepository.Remove(FindNumber);
                        }
                    }
                    LoadPetTracker();
                }
            }
        }
        public void LoadPetTracker()
        {
            var petTracker = App.PetTrackerRepository.GetAll();

            uxPetTrackerList.ItemsSource = petTracker
                                           .Select(t => PetTrackerModel.ToModel(t))
                                           .ToList();
        }