How do I strip non-alphanumeric characters (including spaces) from a string?

Question

How do I strip non alphanumeric characters from a string and loose spaces in C# with Replace?

I want to keep a-z, A-Z, 0-9 and nothing more (not even \" \" spaces).<

Answer 1

var text = "Hello there(hello#)";

var rgx = new Regex("[^a-zA-Z0-9]");

text = rgx.Replace(text, string.Empty);