C#定时器的使用

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Timer timer1;
this.timer1.Interval = 1000;

this.timer1.Enabled = true;
this.timer1.Tick += new System.EventHandler(this.timer1_Tick);

private void timer1_Tick(object sender, EventArgs e)
{
ArrayList AutoTask = new ArrayList();
AutoTask.Add("8:30:00");
AutoTask.Add("9:30:00");
AutoTask.Add("10:30:00");
AutoTask.Add("11:30:00");

for (int n = 0; n < 4; n++)
{
if (dtAuto.ToLongTimeString().Equals(AutoTask[n]))
{
MessageBox.Show("现在时间是" + AutoTask[n]);
}
}
}