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

• \r inserts U+000DCARRIAGE RETURN
• \n inserts U+000ALINE FEED

You can insert one, or the other, or both:

• \r\n inserts U+000DU+000A
• \n\r inserts U+000AU+000D

If you intention is to indicate "the end of the line", different platforms, and different technologies, expect you to insert different things:

• Windows: U+000DU+000A (i.e. \r\n)
• HTTP: U+000DU+000A (i.e. \r\n)
• HTML: U+000A (i.e. \n)
• Unix: U+000A (i.e. \n)
• Macintosh: U+000D (i.e. \r)
• zOS: U+0085 (i.e. \x85)