private void button3_Click(object sender, EventArgs e)
        {
            int  x;
            bool t = int.TryParse(txtTrainID.Text, out x);

            if (t)
            {
                var train = TrainHandling.GetTrainById(x);
                if (train == null)
                {
                    MessageBox.Show("Invalid Train ID");
                }
                else
                {
                    bool z = TrainHandling.RemoveTrain(x);
                    if (z)
                    {
                        MessageBox.Show("Train Removed Successfully");
                    }
                    else
                    {
                        MessageBox.Show("Train hasn't been Removed Successfully");
                    }
                }
            }
        }
        private void button2_Click(object sender, EventArgs e)
        {
            int  x;
            bool t = int.TryParse(txtTrainID.Text, out x);

            if (t)
            {
                var train = TrainHandling.GetTrainById(x);
                if (train == null)
                {
                    MessageBox.Show("Invalid Train ID");
                }
                else
                {
                    EditTrain tr = new EditTrain();
                    tr.Init(x, train.StartingStation, train.EndingStation,
                            train.DepartureDate, train.ArrivalDate, train.NumberOfCars);
                    tr.Show();
                }
            }
            else
            {
                MessageBox.Show("Invalid Train ID");
            }
        }
        private void button1_Click(object sender, EventArgs e)
        {
            TrainHandling.EditTrain(Id, txtFrom.Text, txtTo.Text, txtDepDate.Text, txtArrDate.Text, int.Parse(txtCarsNum.Text));
            var frm = new EditTrain();

            this.Hide();
            frm.Closed += (hh, uu) => this.Close();
        }
        public AvailableTrains()
        {
            InitializeComponent();
            var list = TrainHandling.ViewTrains();

            foreach (var item in list)
            {
                string[] row          = { item.ID.ToString(), item.DepartureDate, item.ArrivalDate, item.StartingStation, item.EndingStation, item.NumberOfCars.ToString(), item.AvailableSeats.ToString() };
                var      listViewItem = new ListViewItem(row);
                listView1.Items.Add(listViewItem);
            }
        }