Difference Between "\N" and Environment.Newline

Difference between \n and Environment.NewLine

Depends on the platform. On Windows it is actually "\r\n".

From MSDN:

A string containing "\r\n" for
non-Unix platforms, or a string
containing "\n" for Unix platforms.

System.Environment.NewLine and \n

Given that you've tagged this as asp.net I'll assume that txtSomeMultiLineTextBox is ultimately a TextArea.

TextArea returns text that is delimited either by \n or \r\n depending on the specific browser version. (IE used to always use \r\n and now uses \n, strange but true.)

So probably the reason why it used to work was because you were testing on an earlier version of IE, where \r\n was used as the new line, whereas you're now using either IE 10, 11 or Chrome, and \n is the newline.

So, to be tolerant of both situations do this:

myString.Replace("\r\n", "\n").Replace("\n", "<br />");

And just to clear this up once and for all:

Don't trust Environment.NewLine to solve this for you.

If your environment is Windows, then there is no single consistent new line used everywhere, even within Microsoft products. Better to be prepared to roll up your sleeves and normalise the line endings for yourself.

Why is Environment.NewLine = \r\n when \n in a string literal functions the same?

The point of Environment.NewLine is to return the newline character for the platform. Presumably for implementations of the .NET framework atop Linux or Unix, it would return just \n.

In C#, what's the difference between \n and \r\n?

\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

C# \n, \r\n or Environment.NewLine

Better use Environment.NewLine because \r and \n are platform dependant.

\n is Unix, \r is Mac, \r\n is Windows

Environment.NewLine would return any of the above based on the operating system.

Is \n equivalent to Environment.NewLine in .NET?

This is may be your answer Difference between "\n" and Environment.NewLine

why is it sometimes the newline character is \r\n instead of just '\n'?

From http://en.wikipedia.org/wiki/Newline:

• LF: Multics, Unix and Unix-like systems (GNU/Linux, Mac OS X, FreeBSD, AIX, Xenix, etc.), BeOS, Amiga, RISC OS and others.
• CR+LF: Microsoft Windows, DEC TOPS-10, RT-11 and most other early non-Unix and non-IBM OSes, CP/M, MP/M, DOS (MS-DOS, PC-DOS, etc.), Atari TOS, OS/2, Symbian OS, Palm OS
• LF+CR: Acorn BBC and RISC OS spooled text output.
• CR: Commodore 8-bit machines, Acorn BBC, TRS-80, Apple II family, Mac OS up to version 9 and OS-9
• RS: QNX pre-POSIX implementation.

CRLF Was intended to be compatible with all the others.

The above all mean newline. THe original meaning was lost, even if someone had an argument for using one or the other, at some point in history.

What is the use of Environment.NewLine and TextWriter.NewLine properties

All newlines escaped as \n in a string are single-character ASCII newlines (0x0A) (not Windows newlines 0D0A) and output to streams in writers as 0x0A unless the programmer takes some explicit step to convert these within the string to the format 0D0A.

The TextWriter.NewLine property is used only by methods like WriteLine, and controls the formatting of the implicit newline that is appended as part of the invocation.

The distinction between Environment.NewLine and TextWriter.NewLine is that Environment.NewLine is readonly, only meant to be queried by programmers. (This is different from Java, for instance, where you can change the "system-wide" newline formatting default with System.setProperty("line.separator", x);

In C# you can modify the format of the implicit newline when writing using TextWriter.NewLine, which is initialized to Environment.NewLine. When using TextReader methods that read lines, there is no TextReader.NewLine property. The implicit newline behavior for readers is to break at any 0x0A, 0x0D, or 0D0A

As pointed out by rene the original problem could be resolved by writing:

sw.Write("1\uf0f1\n2\ue0e1\n3\ud0d1\n".Replace("\n", Environment.NewLine));

What is the use of Environment.NewLine and TextWriter.NewLine properties

All newlines escaped as \n in a string are single-character ASCII newlines (0x0A) (not Windows newlines 0D0A) and output to streams in writers as 0x0A unless the programmer takes some explicit step to convert these within the string to the format 0D0A.

The TextWriter.NewLine property is used only by methods like WriteLine, and controls the formatting of the implicit newline that is appended as part of the invocation.

The distinction between Environment.NewLine and TextWriter.NewLine is that Environment.NewLine is readonly, only meant to be queried by programmers. (This is different from Java, for instance, where you can change the "system-wide" newline formatting default with System.setProperty("line.separator", x);

In C# you can modify the format of the implicit newline when writing using TextWriter.NewLine, which is initialized to Environment.NewLine. When using TextReader methods that read lines, there is no TextReader.NewLine property. The implicit newline behavior for readers is to break at any 0x0A, 0x0D, or 0D0A

As pointed out by rene the original problem could be resolved by writing:

sw.Write("1\uf0f1\n2\ue0e1\n3\ud0d1\n".Replace("\n", Environment.NewLine));

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