c# - Regex Expressions for all non alphanumeric symbols

Question

I am trying to make a regular expression for a string that has at least 1 non alphanumeric symbol in it

The code I am trying to use is

Regex symbolPattern = new Regex("?[!@#$%^&*()_-+=[{]};:<>|./?.]");

I'm trying to match only one of !@#$%^&*()_-+=[{]};:<>|./?. but it doesn't seem to be working.

Answer 1

If you want to match non-alphanumeric symbols then just use W|_.

Regex pattern = new Regex(@"W|_");

This will match anything except 0-9 and a-z. Information on the W character class and others available here (c# Regex Cheet Sheet).

• https://www.mikesdotnetting.com/article/46/c-regular-expressions-cheat-sheet