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Escape Sequences
Escape SequenceRepresents
 
\a Bell (alert)
\b Backspace
\f Formfeed
\n New line
\r Carriage return
\t Horizontal tab
\v Vertical tab
\' Single quotation mark
\" Double quotation mark
\\ Backslash
\? Literal question mark
\ooo ASCII character in octal notation
\xhh ASCII character in hexadecimal notation
\xhhhh Unicode character in hexadecimal notation if this escape sequence is used in a wide-character constant or a Unicode string literal. For example, WCHAR f = L'\x4e00' or WCHAR b[] = L"The Chinese character for one is \x4e00".

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force to CRLF
input.Replace("\r\n", "\n").Replace("\r", "\n").Replace("\n", "\r\n")