wpf连接mysql错误提示

using System;
using System.Data;
using MySql.Data.MySqlClient;
using System.Windows;

namespace WPFMySQLExample
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            ConnectToMySQL();
        }

        private void ConnectToMySQL()
        {
            string connectionString = "Server=localhost;Port=3306;Database=mydatabase;Uid=myuser;Pwd=mypassword;";
            try
            {
                using (MySqlConnection connection = new MySqlConnection(connectionString))
                {
                    connection.Open();
                    MessageBox.Show("连接成功！");
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show("连接失败：" + ex.Message);
            }
        }
    }
}