高手请进 BAT定时删除文件！

没有人能帮助吗？

这是什么的？

private void timer1_Tick(object sender, EventArgs e)
{
string[] files = Directory.GetFiles("J:\\data", "*.txt", SearchOption.AllDirectories);
foreach (string file in files)
{
string s = file;
FileInfo f = new FileInfo(s);
DateTime nowtime = DateTime.Now;
TimeSpan t = nowtime - f.CreationTime;
int day = t.Days;
if (day > 7)
{
File.Delete(s);
}
}
}