目前.NET 2.0正式版已经发布;
http://www.microsoft.com/downloads/details.aspx?familyid=0856EACB-4362-4B0D-8EDD-AAB15C5E04F5&displaylang=zh-cn
没有比这个更简单的了Richtextbox1.text = Regex.Replace(Richtextbox1.text, " <(\/\s*)?((\w+:)?\w+)(\w+(\s*=\s*(([ " " '])(\\[ " " ' 'tbnr]|[^\7])*?\7|\w+)|.{0})|\s)*?(\/\s*)?>", String.Empty)