如何:

How about:

string filepath = ...;
string text = File.ReadAllText(filepath);
...
File.WriteAllText(filepath, text);

这是您要的吗?
文本在读取和写入时已经包含新行-不需要特殊处理，对吗?

Is this what you ask for?
The text already contains the new lines, while reading and writing - no special handling needed, right?

除了提到解决方案3之外，您还可以尝试使用以下方法之一，

In addition to the Solution 3 mention, you could try using one of the following methods,

WriteAllLines(String, IEnumerable(Of String))
WriteAllLines(String, String())
WriteAllLines(String, IEnumerable(Of String), Encoding)
WriteAllLines(String, String(), Encoding)
WriteAllText(String, String)
WriteAllText(String, String, Encoding)

更多详细信息文件类 [

More details File Class[^]

Hope it helps :)

其他答案的重要补充:请勿使用显式的

您永远不要使用"\ r \ n"，因为使用立即常量是不好的.这不是便携式的.正确的事情是使用静态属性System.Environment.NewLine.

(顺便说一句，实际上您应该尽量避免使用所有这些立即常量，除了0、1，null之类的东西.即使字符串"是坏的；您也应该使用string.Empty.)

请参阅: http://msdn.microsoft.com/en-us/library/system .environment.newline.aspx [ ^ ].

—SA

An important addition to other answers: don''t use explicit

You should never use "\r\n" — using immediate constants is bad; and this is not portable. Right thing is using static property System.Environment.NewLine.

(By the way, you really should avoid all those immediate constants by all means, except something like 0, 1, null. Even the string "" is bad; you should use string.Empty.)

Please see: http://msdn.microsoft.com/en-us/library/system.environment.newline.aspx[^].

—SA