Simple GUI

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace simple_GUI
{

    public partial class Form1 : Form
    {

        Customer myCustomer = new Customer(); //Declare an instance of the customer class within my Windows form

        public Form1()
        {
            InitializeComponent();
        }

        private void saveButton_Click(object sender, EventArgs e)
        {
            myCustomer.Id = Convert.ToInt32(customerIDTextBox.Text); //How to handle exceptions?
            myCustomer.Name = fullNameTextBox.Text;
            myCustomer.Address = addressTextBox.Text;
            myCustomer.Email = emailTextBox.Text;
            myCustomer.Phone = Convert.ToDouble(phoneNumberTextBox.Text);
            myCustomer.AddDate = Convert.ToDateTime(addressTextBox.Text);
            myCustomer.TotalTransactions = Convert.ToInt32(totalTransactionsTextBox.Text);


        }

        private void retrieveButton_Click(object sender, EventArgs e)
        {
            customerIDTextBox.Text = Convert.ToString(myCustomer.Id); //Ask about the conversions
            fullNameTextBox.Text = myCustomer.Name;
            addressTextBox.Text = myCustomer.Address;
            emailTextBox.Text = myCustomer.Email;
            phoneNumberTextBox.Text = Convert.ToString(myCustomer.Phone);
            addDateTextBox.Text = Convert.ToString(myCustomer.AddDate);
            totalTransactionsTextBox.Text = Convert.ToString(myCustomer.TotalTransactions);

        }

        private void clearButton_Click(object sender, EventArgs e)
        {
            customerIDTextBox.Text = "";
            fullNameTextBox.Text = "";
            addressTextBox.Text = "";
            emailTextBox.Text = "";
            phoneNumberTextBox.Text = "";
            addDateTextBox.Text = "";
            totalTransactionsTextBox.Text = Convert.ToString("");

        }
    }
}