问题
As per subject...
回答1:
\n is Unix, \r is Mac, \r\n is Windows.
Sometimes it's giving trouble especially when running code cross platform. You can bypass this by using Environment.NewLine.
Please refer to What is the difference between \r, \n and \r\n ?! for more information. Happy reading
回答2:
The Difference
There are a few characters which can indicate a new line. The usual ones are these two:
* '\n' or '0x0A' (10 in decimal) -> This character is called "Line Feed" (LF).
* '\r' or '0x0D' (13 in decimal) -> This one is called "Carriage return" (CR).
Different Operating Systems handle newlines in a different way. Here is a short list of the most common ones:
* DOS and Windows
They expect a newline to be the combination of two characters, namely '\r\n' (or 13 followed by 10).
* Unix (and hence Linux as well)
Unix uses a single '\n' to indicate a new line.
* Mac
Macs use a single '\r'.
Taken from Here
回答3:
"\n" is just a line feed (Unicode U+000A). This is typically the Unix line separator.
"\r\n" is a carriage return (Unicode U+000D) followed by a line feed (Unicode U+000A). This is typically the Windows line separator.
回答4:
Basically comes down to Windows standard: \r\n and Unix based systems using: \n
http://en.wikipedia.org/wiki/Newline
回答5:
\n = LF (Line Feed) // Used as a new line character on Unix
\r = CR (Carriage Return) // Used as a new line character on Mac
\r\n = CR + LF // Used as a new line character on Windows
(char)13 = \r = CR
Environment.NewLine = any of the above code based on the operating system
// .NET provides the Environment class which provides many data based on operating systems, so if the application is built on Windows, and you use CR + LF ("\n\r" instead of Environment.NewLine) as the new line character in your strings, and then Microsoft creates a VM for running .NET applications in Unix, then there will be problem. So, you should always use Environment.NewLine when you want a new line character. Now you need not to care about the operating system.
回答6:
\n is the line break used by Unix(-like) systems, \r\n is used by windows. This has nothing to do with C#.
回答7:
They are just \r\n and \n are variants.
\r\n is used in windows
\n is used in mac and linux
回答8:
It's about how the operating system recognizes line ends.
- Windows user \r\n
- Mac user \r
- Linux uses \n
Morale: if you are developing for Windows, stick to \r\n. Or even better, use C# string functions to deal with strings which already consider line endings (WriteLine, and such).
来源：https://stackoverflow.com/questions/3986093/in-c-whats-the-difference-between-n-and-r-n