如何在c#中重新启动项目后获取以前输入的文本框的值

using System;
using System.Windows.Forms;
using System.Data.SqlClient;

namespace RestartProject
{
    public partial class MainForm : Form
    {
        private string connectionString = "YourConnectionString"; // 替换为实际的数据库连接字符串

        public MainForm()
        {
            InitializeComponent();
        }

        private void MainForm_Load(object sender, EventArgs e)
        {
            LoadTextBoxValues();
        }

        private void MainForm_FormClosing(object sender, FormClosingEventArgs e)
        {
            SaveTextBoxValues();
        }

        private void SaveTextBoxValues()
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                connection.Open();
                SqlCommand command = new SqlCommand("UPDATE TextBoxValues SET Value = @Value WHERE Name = @Name", connection);
                command.Parameters.AddWithValue("@Value", textBox1.Text);
                command.Parameters.AddWithValue("@Name", "TextBox1");
                command.ExecuteNonQuery();
            }
        }

        private void LoadTextBoxValues()
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                connection.Open();
                SqlCommand command = new SqlCommand("SELECT Value FROM TextBoxValues WHERE Name = @Name", connection);
                command.Parameters.AddWithValue("@Name", "TextBox1");
                object value = command.ExecuteScalar();
                if (value != null)
                {
                    textBox1.Text = value.ToString();
                }
            }
        }
    }
}