Remove special characters from a string except whitespace

Question

I am looking for a regular expression to remove all special characters from a string, except whitespace. And maybe replace all multi- whitespaces with a single whitespace.

Answer 1

Use the regex [^\w\s] to remove all special characters other than words and white spaces, then replace:

Regex.Replace("[one@ !two three-four]", "[^\w\s]", "").Replace("  ", " ").Trim