messageBox以及新窗体的使用

DialogResult dr = MessageBox.Show("你确定要点击吗", "安全提示", MessageBoxButtons.YesNo);
            if (dr == DialogResult.Yes)
            {
                this.Close();
            }
            else
            {
                MessageBox.Show("我好想睡觉啊");
            }

            Form2 form = new Form2();
            form.Show();
            this.Hide();