C#_formSerializ

using System;
using System.Xml.Serialization;
using System.IO;
using System.Windows.Forms;
using System.Runtime.Serialization.Formatters.Binary;

namespace WindowsFormsApp1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            textBox1.Text = "BMW";
            int.Parse(textBox2.Text = "666");
            int.Parse(textBox3.Text = "578");
            float.Parse(textBox4.Text = "1500");
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Passenger_car psc = new Passenger_car(textBox1.Text, int.Parse(textBox2.Text), int.Parse(textBox3.Text), float.Parse(textBox4.Text));
            Passenger_car psc2 = new Passenger_car(textBox5.Text, int.Parse(textBox6.Text), int.Parse(textBox7.Text), float.Parse(textBox8.Text));
            Passenger_car psc3 = new Passenger_car(textBox9.Text, int.Parse(textBox10.Text), int.Parse(textBox11.Text), float.Parse(textBox12.Text));
            Passenger_car psc4 = new Passenger_car(textBox13.Text, int.Parse(textBox14.Text), int.Parse(textBox15.Text), float.Parse(textBox16.Text));

            Passenger_car[] psc_all = new Passenger_car[] { psc, psc2, psc3, psc4 };

            XmlSerializer formatter = new XmlSerializer(typeof(Passenger_car[]));

            progressBar1.Minimum = 1;
            progressBar1.Maximum = 2;

            using (FileStream fs = new FileStream("cars.xml", FileMode.OpenOrCreate))
            {
                formatter.Serialize(fs, psc_all);
                progressBar1.PerformStep();
            }

        }



        private void button2_Click(object sender, EventArgs e)
        {
            Passenger_car psc = new Passenger_car(textBox1.Text, int.Parse(textBox2.Text), int.Parse(textBox3.Text), float.Parse(textBox4.Text));
            Passenger_car psc2 = new Passenger_car(textBox5.Text, int.Parse(textBox6.Text), int.Parse(textBox7.Text), float.Parse(textBox8.Text));
            Passenger_car psc3 = new Passenger_car(textBox9.Text, int.Parse(textBox10.Text), int.Parse(textBox11.Text), float.Parse(textBox12.Text));
            Passenger_car psc4 = new Passenger_car(textBox13.Text, int.Parse(textBox14.Text), int.Parse(textBox15.Text), float.Parse(textBox16.Text));

            Passenger_car[] psc_all = new Passenger_car[] { psc, psc2, psc3, psc4 };

            BinaryFormatter formatter = new BinaryFormatter();


            progressBar2.Minimum = 1;
            progressBar2.Maximum = 2;
            using (FileStream fs = new FileStream("cars.dat", FileMode.OpenOrCreate))
            {
                formatter.Serialize(fs, psc_all);
                progressBar2.PerformStep();
            }
        }
        private void label1_Click(object sender, EventArgs e)
        {
        }

        private void label3_Click(object sender, EventArgs e)
        {

        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }

        private void progressBar1_Click(object sender, EventArgs e)
        {

        }

        private void label5_Click(object sender, EventArgs e)
        {

        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (MessageBox.Show("Если закроете окно,то будет произведена бинарная сериализация", "Best Serialization", MessageBoxButtons.OKCancel) == DialogResult.OK)
            {
                button2.PerformClick();
            }

        }

        private void Form1_FormClosed(object sender, FormClosedEventArgs e)
        {
        }
    }
}