string with new line inside resources

[cilu]

Well, the behaviour is perfectly ok. The @ creates a verbatim string, i.e. a string that is exactly how it looks (something like WYSIWYG).

string s = @"c:\folder\file.txt";

and

string s = "c:\\folder\\file.txt";

are the same.
In your case:

string s = @"this is a test \r\n new line";

is the same with

string s = "this is a test \\r\\n new line";

Do what MadHatter indicated.