Regex to remove all special characters from string?

Question

I\'m completely incapable of regular expressions, and so I need some help with a problem that I think would best be solved by using regular expressions.

I have list

Answer 1

[^a-zA-Z0-9] is a character class matches any non-alphanumeric characters.

Alternatively, [^\w\d] does the same thing.

Usage:

string regExp = "[^\w\d]";
string tmp = Regex.Replace(n, regExp, "");