Parse HTML page and capture contents

Here I show a simple class that receives the HTML string and then extracts all the links and their text into structs. It is fairly fast, but I offer some optimization tips further down. It would be better to use a class.

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Text.RegularExpressions; 
using System.Threading.Tasks; 

namespace PSC 
{ 
    public class Finder 
    { 
        public struct LinkItem 
        { 
            public string Href; 
            public string Text; 

            public override string ToString() 
            { 
                return Href + "\n\t" + Text; 
            } 
        } 
        
        public class LinkFinder 
        { 
            public static List<LinkItem> Find(string file) 
            { 
                List<LinkItem> list = new List<LinkItem>(); 
                // 1. 
                // Find all matches in file. MatchCollection 
                m1 = Regex.Matches(file, @"(<a.*?>.*?</a>)", RegexOptions.Singleline);
                
                // 2. 
                // Loop over each match. 
                foreach (Match m in m1) 
                { 
                    string value = m.Groups[1].Value; 
                    LinkItem i = new LinkItem(); 
                    
                    // 3. 
                    // Get href attribute. 
                    Match m2 = Regex.Match(value, @"href=\""(.*?)\""", RegexOptions.Singleline); 
                    if (m2.Success) 
                    { 
                        i.Href = m2.Groups[1].Value; 
                    } 
                    
                    // 4. 
                    // Remove inner tags from text. 
                    string t = Regex.Replace(value, @"\s*<.*?>\s*", "", RegexOptions.Singleline); 
                    i.Text = t; 
                    list.Add(i); 
                } 
                return list; 
            } 
        } 
    } 
}