C# XmlSerializer setting text delimiters?

is there an way to serialize a xml with text delimiters? I've a xml document with some regex string, but if I execute my application I got a parsing error. I'm sure the reason for this is the unescaped regex in the xml document. Is there a way to use something like text delimiters? If not, how can I escape the following regex: ".+?)" rel="bookmark">.+?"?

Thanks for help!