How do I do a backlash in a specified string?

[rosezyxx]

How do I do a backslash () in a specified string as seen in the picture below? I get the following errors:

"Newline in constant" under "
") and ; expected" after ;

[asterd-og]

You can do

Console.WriteLine(@"\");

or

Console.WriteLine("\\");

[ghost]

How do I do a backslash () in a specified string as seen in the picture below? I get the following errors:

Consider learning a programming language before using cosmos xd