String.Replace with \ in it?

Question

How can I replace the "\\" in a string with a double slash "\\\\"?

I tried String.Replace("\\","\\\\") but then intellisense stops working :(

Thanks!

Answer 1

Try:

String.Replace("\\","\\\\")

This is because a character can follow \\, which makes a special character. \\" means put a literal double quote in the string, rather than close it.

Here are some common ones:
\\n - Line feed
\\r - Carriage return (Windows newlines are \\r\\n )
\\t - Tab

The other answers, which say to use @"\\" are right and easier to understand, so should probably be used instead.

Answer 2

\\ is a reserved character in a string, it's an "escape". So, for instance, \\n means a linefeed constant.

string.Replace(@"\\", @"\\\\") would work just fine -- the @ tells the compiler to ignore the escaping of \\ .

Alternatively, \\\\ means one backslash -- so string.Replace("\\\\", "\\\\\\\\") would work just fine too (although it's a bit unreadable).

Answer 3

使用'@'使反斜杠失去其特殊含义：

String.Replace(@"\", @"\\")