C#在文本文件中生成数据，再次实现操作后如何实现换行生成而不是覆盖原有内容

System.IO.File.WriteAllText(@"D:\" + DateTime.Now.ToString("yyyy-MM-dd") + ".TXT", "" + DateTime.Now.ToString("hh:mm:ss") + " - you input is null\r\n", System.Text.Encoding.UTF8);

http://blog.csdn.net/lujianfeiccie2009/article/details/6531471

using (StreamWriter sw = new StreamWriter(文件路径,true))
{
sw.WriteLine("文本信息");
}
true表示追加，false表示覆盖

System.IO.File.WriteAllText
->
System.IO.File.AppendAllText