Regex regex = new Regex(@"<a\d{2}\s+v='([^']+)'>([^<]+)");
Match match = regex.Match(" <aXX v='bXX'>abcddeef </a>");
if (match.Success)
{
Console.WriteLine(match.Groups[1].Value);
Console.WriteLine(match.Groups[2].Value);
}
Regex regex = new Regex("<aXX\\s+v='([^']+)'>([^<]+)</a>");
Match match = regex.Match("<aXX v='bXX'>abcddeef </a>");
if (match.Success)
{
Console.WriteLine(match.Groups[1].Value);
Console.WriteLine(match.Groups[2].Value);
}