Allow specific punctuation and remove aphostrophe

Question

I'm trying to remove specific punctuation from string

I need to keep in string only ".", ",", "!", "+", "*", "-" but remove everything, including apostrophe "'" for example

what's up!

must be:

whats up!

So this way, it removes everything

string res = Regex.Replace(filtr2, @"[^\w\s]", "");  

Answer 1

Hope that you are looking for something like this :

string rexFormat=@"[^0-9a-zA-Z\.,!+\-* \w ]";
string myInPutString ="what'sup ! my dear friend?";
string replacedString = Regex.Replace(myInPutString, rexFormat, string.Empty);
// will give you whatsup ! my dear friend

The special characters ' and ? were removed