How to remove numbers from string using Regex.Replace?

Question

I need to use Regex.Replace to remove all numbers and signs from a string.

Example input: 123- abcd33
Example output: abcd

Answer 1

You can do it with a LINQ like solution instead of a regular expression:

string input = "123- abcd33";
string chars = new String(input.Where(c => c != '-' && (c < '0' || c > '9')).ToArray());

A quick performance test shows that this is about five times faster than using a regular expression.