string reg = @"<a[^>]*href=([""‘])?(?<href>[^‘""]+)\1[^>]*>";
MatchCollection matches = Regex.Matches(content, reg, RegexOptions.IgnoreCase);
foreach (Match item in matches)
{
var href= item.Groups[1].Value;
}原文地址:http://blog.csdn.net/chinaplan/article/details/24801137