FileStream实例重复利用要小心
<div id="cnblogs_post_body">直接看看源代码的错误地方吧。<div class="cnblogs_code">using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.IO;namespace FileStreamTest{ class Program { static void Main(string[] args) { String file = @"D:\temp.txt"; FileStream fileStream; if (File.Exists(file)) { fileStream = File.OpenRead(file); } else { fileStream = File.Create(file); } //这里对StreamWriter使用using，会导致在这个域结束之后，对fileStream的流关闭 using (StreamWriter writer=new StreamWriter(fileStream)) { writer.WriteLine("test some plain text!"); } //这里再传入fileStream的文件流已经被关闭，所以会在运行时报错 using (StreamReader reader=new StreamReader(fileStream)) { Console.WriteLine(reader.ReadLine()); } fileStream.Close(); fileStream.Dispose(); } }}
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