C#通过流写入一行数据到文件的方法

using System;
using System.IO;
public class WriteFileStuff {
 public static void Main() {
  FileStream fs = new FileStream("c:\\tmp\\WriteFileStuff.txt", FileMode.OpenOrCreate, FileAccess.Write);      
  StreamWriter sw = new StreamWriter(fs);
  try {
    sw.WriteLine("Howdy World.");
  } finally {
    if(sw != null) { sw.Close(); }
  }
 }
}