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有一文本文件，内容如下：
.......
absent ['1bs4nt, 4b'sent]
a.(from)缺席,不在场;漫不经心的
absolute ['1bs4lu:t]
a. 绝对的,完全的
absorb [4b's3:b]
v. 吸收; 吸引,使专心
abstract ['1bstr1kt]
a. 抽象的n. 摘要,提要v. 提(抽)取
.......
方括号中应该是音标，因为不能正常显示，希望将其删除，总共有5000多个单词，用C#正则表达式，代码如下:
 using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Text.RegularExpressions;
namespace Test
   {
 class Program
  {
static void Main(string[] args)
{
//设置字符编码很重要，否则会得到乱码
StreamReader sr = new StreamReader("c:\\1.txt", System.Text.Encoding.Default);
StreamWriter sw = new StreamWriter("c:\\2.txt",false , System.Text.Encoding.Default);
using(sr)
using(sw)
{
String temp=sr.ReadToEnd();
Regex rx = new Regex(@"\[.*\]", RegexOptions.Multiline);//多行模式
temp=rx.Replace(temp, "");
sw.Write(temp);
 }
//Regex Match Group Capture 的用法
//string text = "One car red car blue car";
//string pat = @"(?<1>\w+)\s+(?<2>car)\s*";
/**///// Compile the regular expression.
//Regex r = new Regex(pat, RegexOptions.IgnoreCase);
/**///// Match the regular expression pattern against a text string.
//Match m = r.Match(text);
//while (m.Success)
//{
// // Display the first match and its capture set.
// System.Console.WriteLine("Match=[" + m + "]");
// CaptureCollection cc = m.Captures;
// foreach (Capture c in cc)
// {
// System.Console.WriteLine("Capture=[" + c + "]");
// }
// // Display Group1 and its capture set.
// Group g1 = m.Groups[1];
// System.Console.WriteLine("Group1=[" + g1 + "]");
// foreach (Capture c1 in g1.Captures)
// {
// System.Console.WriteLine("Capture1=[" + c1 + "]");
// }
// // Display Group2 and its capture set.
// Group g2 = m.Groups[2];
// System.Console.WriteLine("Group2=[" + g2 + "]");
// foreach (Capture c2 in g2.Captures)
// {
// System.Console.WriteLine("Capture2=[" + c2 + "]");
// }
// // Advance to the next match.
// m = m.NextMatch();
//}
}
}
 }
1、读写文本文件的时候必须要设置字符编码，否则中文会出现乱码；
2、设置多行模式
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