读取Xml文件中的DocmentType节点,该如何处理

读取Xml文件中的DocmentType节点
xml文件中有一个DocmentType节点：
<!DOCTYPE configuration [<!ELEMENT PatchInfos ANY><!ATTLIST PatchInfos ID ID #REQUIRED>]>

怎么才能把"[<!ELEMENT PatchInfos ANY><!ATTLIST PatchInfos ID ID #REQUIRED>]"读出来反给一个字符串？

[解决办法]

C# code

        string xml = "<!DOCTYPE configuration [<!ELEMENT PatchInfos ANY><!ATTLIST PatchInfos ID ID #REQUIRED>]><items>1111</items>";        XmlDocument doc = new XmlDocument();        doc.LoadXml(xml);        XmlDocumentType xdt = doc.DocumentType;        Response.Write(xdt.InternalSubset);