HTMLagilitypack沒有刪除所有的html標籤如何有效地解決這個問題？

我使用以下方法從字符串中刪除所有html：

public static string StripHtmlTags(string html)
        {
            if (String.IsNullOrEmpty(html)) return "";
            HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument();
            doc.LoadHtml(html);
            return doc.DocumentNode.InnerText;
        }

但它似乎忽略了以下標籤： […]

所以字符串基本返回：

> A hungry thief who stole a rack of pork ribs from a grocery store has
> been sentenced to spend 50 years in prison. Willie Smith Ward felt the
> full force of the law after being convicted of the crime in Waco,
> Texas, on Wednesday. The 43-year-old may feel slightly aggrieved over
> the severity of the […]

如何確保剝離這些標籤？

任何形式的幫助表示讚賞，謝謝。