C# 显示时间并时间跳动

private void timer1_Tick(object sender, EventArgs e)
        {
            this.tsslabTime.Text = DateTime.Now.ToString("yyyy-MM-dd") + " " 
                + DateTime.Now.ToString("HH:mm:ss") + " "
                + DateTime.Now.ToString("dddd", new System.Globalization.CultureInfo("zh-cn"));// ;zh-cn
        }