Why do we use @ with "\" while trying to replace it with another string [duplicate]

Question

Possible Duplicate:
What's the @ in front of a string in C#?

why do we use @ to replace \ with another string using string.replace(@"\","$$") i'm using C# windows application

Answer 1

The @ in front of a string literal makes it a verbatim string literal, so the backslash \ does not need to be doubled. You can use "\\" instead of @"\" for the same effect.

Answer 2

Because if you didn't, you'd have to escape \ with \\

@ is used to what's called verbatim strings