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System.IO.StreamReader sr = new System.IO.StreamReader("d:\\test.txt");
string s = sr.ReadToEnd();
sr.Close();
s = s.Replace("123","456");
System.IO.StreamWriter sw = new System.IO.StreamWriter("d:\\test.txt",false);
sw.Write(s);
sw.Close();
StreamReader sr = new StreamReader("C:\\1.htm", Encoding.Default);
string str=null;
List<string> list = new List<string>();
while ((str = sr.ReadLine()) != null)
{
list.Add(str);
}
sr.Close();
StreamWriter sw = new StreamWriter("C:\\1.htm", false, Encoding.Default);
list[1]= list[1].Replace("大侠", "KKOO");
foreach (string s in list)
sw.WriteLine(s);
sw.Close();