Regex to find tag in string

Pretty much what the title says. I have a string with some tags for rich text. I'm looking for those tags and contents too with a regular expression. Following, the code till this moment. Just a function and a regex, I was still debugging.

Code (csharp):

1.  
2. public void GetTags(string message)
3. {
4.     Match match = regex.Match(message);
5.  
6.     foreach (Group g in match.Groups)
7.     {
8.         Debug.Log(g.Value);
9.     }
10. }
11.  
12. public Regex regex = new Regex(@"(?<start_tag><[^>]*>)(?<tag>.*?)(?<end_tag></[^>]*>)");
13.  

I tested the regular expression and seems to work well, but when I try it in Unity nothing happens. Sometimes I get empty message in console, other times I get nothing at all. The groups seems to be inexistent. What am I doing wrong?

 

anybody knows?