重新编写文本文件(ReWrite text file)

 如何重写文本文件（在指定位置）并锁定他？ 
 
 要重写，需要先阅读然后再编写。 - 这很容易 - 但我需要将make文件锁定到整个重写中的所有其他进程。 
 
 我有方法。 
 
    public bool AccessBridge()
    {
        try
        {
            fs = new FileStream("bridge.ini", FileMode.Open, FileAccess.ReadWrite);
            sr = new StreamReader(fs);
            sw = new StreamWriter(fs);
            return true;
        }
        catch (IOException ioe)
        {
            return false;
        }
    }
 
 然后再测试一部分： 
 
        string precteno = sr.ReadToEnd();
        //Some modify string
        //now I need delete whole text from file
        sw.Write(precteno);
 
 有任何想法吗？ 我已经处理了第二天晚上。 

How to rewrite text file (at specificated position) and lock him?
 
For rewrite it need read and then to be written. - it is easy - but I need make file to be locked to all other process in the whole rewriting. 
 
I have method.
 
    public bool AccessBridge()
    {
        try
        {
            fs = new FileStream("bridge.ini", FileMode.Open, FileAccess.ReadWrite);
            sr = new StreamReader(fs);
            sw = new StreamWriter(fs);
            return true;
        }
        catch (IOException ioe)
        {
            return false;
        }
    }
 
Then another test part:
 
        string precteno = sr.ReadToEnd();
        //Some modify string
        //now I need delete whole text from file
        sw.Write(precteno);
 
Any ideas? I have deal with it 2nd night.

原文：https://stackoverflow.com/questions/33794238