Difference between \015 & \012 and \r & \n

Question

I have an old C++ program that is writing files and FTPing them to a IBM mainframe.

This program is being converted to C#.

Things seems OK in transferring but the mainframe viewer is not displaying the file properly.

What is the difference between \015 & \012 and \r & \n? C++ is using the numbers and C# is using \r\n.

Could this be why things don't appear properly?

The files are getting transferred as ASCII so unsure why it appears like garbage!

Answer 1

\015 is an octal literal, which C# does not support.
C# parses it as \0 (character code zero) followed by the two characters 15