Regex.Matches c# double quotes

Question

I got this code below that works for single quotes. it finds all the words between the single quotes. but how would I modify the regex to work with double quotes?

keywords is coming from a form post

so

keywords = 'peace "this world" would be "and then" some'       // Match all quoted fields     MatchCollection col = Regex.Matches(keywords, @"'(.*?)'");      // Copy groups to a string[] array     string[] fields = new string[col.Count];     for (int i = 0; i < fields.Length; i++)     {         fields[i] = col[i].Groups[1].Value; // (Index 1 is the first group)     }// Match all quoted fields     MatchCollection col = Regex.Matches(keywords, @"'(.*?)'");      // Copy groups to a string[] array     string[] fields = new string[col.Count];     for (int i = 0; i < fields.Length; i++)     {         fields[i] = col[i].Groups[1].Value; // (Index 1 is the first group)     } 

Answer 1

You would simply replace the ' with \" and remove the literal to reconstruct it properly.

MatchCollection col = Regex.Matches(keywords, "\\\"(.*?)\\\""); 

Answer 2

The exact same, but with double quotes in place of single quotes. Double quotes aren't special in a regex pattern. But I usually add something to make sure I'm not spanning accross multiple quoted strings in a single match, and to accomodate double-double quote escapes:

string pattern = @"""([^""]|"""")*"""; // or (same thing): string pattern = "\"(^\"|\"\")*\""; 

Which translates to the literal string

"(^"|"")*"