private void timer1_Tick(object sender, EventArgs e)
        {
            int count;
            count = int.Parse (label1.Text);
            count++;
            label1.Text = count.ToString();
            this.Text = "现在的日期" + System.DateTime.Now.Year.ToString() + "年" + System.DateTime.Now.Month.ToString() + "月" + System.DateTime.Now.Day.ToString() + "日" + System.DateTime.Now.Hour.ToString() + ":" + System.DateTime.Now.Minute.ToString() + ":" + System.DateTime.Now.Second.ToString();
        }

这一句count = int.Parse (label1.Text);出现问题，怎么解决呀