c# - How to remove extra returns and spaces in a string by regex?

Question

I convert a HTML code to plain text.But there are many extra returns and spaces.How to remove them?

Answer 1

string new_string = Regex.Replace(orig_string, @"s", "") will remove all whitespace

string new_string = Regex.Replace(orig_string, @"s+", " ") will just collapse multiple whitespaces into one