学步园

textbox 要换行，要先设Multiline为true才可以换行，用\r\n换行.

例：

            exeTime.Text="";
            DateTime dt = DateTime.Now;           //获取系统当前日期
            DateTimeOffset dd = new DateTimeOffset(dt);

            string strB = String.Format("{0:F}", dt); //格式化成短日期格式 

            startTime.Text = strB;

            for (int i = 1; i <= 8; i++)
            {
                dd = (DateTimeOffset)exp.GetNextValidTimeAfter(dd);
                exeTime.Text += (i + ": " + dd.ToString("YYYY-MM-DD hh:mm:ss") + "\r\n");
                dd = dd.Add(new TimeSpan(1000));
            }