Regex for removing only specific special characters from string

Question

I'd like to write a regex that would remove the special characters on following basis:

• To remove white space character
• @, &, ', (, ), <, > or #

I have written this regex which removes whitespaces successfully:

 string username = Regex.Replace(_username, @"\s+", "");

But I'd like to upgrade/change it so that it can remove the characters above that I mentioned.

Can someone help me out with this?

Answer 1

 string username = Regex.Replace(_username, @"(\s+|@|&|'|\(|\)|<|>|#)", "");