Replacing specified characters using Regex .net

Question

I have a small Regex here where I am removing all the white spaces from within a file and replacing them with '-'.

I want to also replace other characters with '-' such as ',' and '_'.

How can I list these characters in my regex?

Regex r = new Regex(@"\s+");

string fileName = r.Replace(Files.Name, @"-");

Answer 1

Regex r = new Regex(@"[\s,_-]+");

string fileName = r.Replace(Files.Name, @"-");

Be aware that the - must be the first, the last or you'll need escaping.

Answer 2

Regex r = new Regex(@"(\s|-|,|_)+");