C#测试小程序，运行到连接MySQL云数据库语句con.Open()后就没有响应，哪位大神能帮诊断一下看是什么原因，谢谢！

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;
using MySql.Data.MySqlClient;

namespace Beauty_key
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
MySqlConnection con = new MySqlConnection(“server=mysql.sqlpub.com;port=3306;user=weiney;password=Krw2dp4C8Jr9NGiz;database=weiney”);

    private void Form1_Load(object sender, EventArgs e)
    {
        try
        {
            if (con.State == ConnectionState.Closed)
            {
                con.Open();
                MessageBox.Show("云数据库连接成功！");
            }
        }
        catch (MySqlException ex)
        {
            MessageBox.Show("云数据库连接失败：" + ex.Message);
        }
    }
}

}