using System;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        string data = "<h2 class=\"product-name\"><a href=\"erkek-ayakkabi-spor-gri-17sfd3007141340-p\" title=\"...\">...</a></h2>\r\n<h2 class=\"test-name\"><a href=\"erkek-ayakkabi-spor-gri-17sfd3007141340-p\" title=\"...\">...</a></h2>\r\n<h2 class=\"product-name\"><a href=\"erkek-ayakkabi-spor-gri-17sfd3007141340-p\" title=\"...\">...</a></h2>\r\n";

        //string regex = "class=\"product-name\"(.*)<a\\shref=\"(.*?)\"";

        string regex = "class=\"product-name\".*<a\\shref=\"(.*?)\"";

        var matches = Regex.Matches(data, regex, RegexOptions.Multiline);

        foreach(Match item in matches)

        {

            //Console.WriteLine("Value: " + item.Groups[2]);

            Console.WriteLine("Value: " + item.Groups[1]);

        }

    }

}