private void button1_Click(object sender, EventArgs e)

...
                                DialogResult response0 = MessageBox.Show("是否重新添加?", "请确认", MessageBoxButtons.YesNo, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2);
                                if (response0 == DialogResult.Yes  )
                                {
                                    button2.Enabled = true;
                                }
...
}
 private void button2_Click(object sender, EventArgs e)
{
...
MessageBox.Show("重新添加成功!");
...
}点击button2,如何不关闭这个窗体?
谢谢!