c# - How can I modify this regular expression to not allow white spaces?

Question

I have the following regular expression which specifies characters the user is allowed to type:

@"^[A-Za-z0-9/!$%^&*()-_+[]{};:'￡@#.?]*$

I know 's' is the character class for white space, but how do I add this to the regular expression so it excludes it? I have searched for this on Stack Overflow - the questions provide solutions to exclude white space but not how to use it in an existing regular expression. If I add it like I have the other characters, it would mean 'allow white space'?

Edit: Not sure why this has been marked down? Thanks to everyone for their answers

Answer 1

First of all, you don't need all those escapes. Second of all, the regex already doesn't allow whitespaces.

@"^[A-Za-z0-9[]/!$%^&*()-_+{};:'￡@#.?]*$"

The [] define a set of characters to allow (followed by * means that characters from the characters set can be zero or more times).

^ matches the beginning and $ matches the end, so the fact that /s isn't anywhere there, means white spaces won't be allowed.