xml中实体引用如何解析,c#解决

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE dmodule[
<!NOTATION svg PUBLIC "-//TEI//NOTATION W3C Scalable Vector Graphics Format//EN">
<!ENTITY AAA-DA10000-0-U8025-00514-A-04-1 SYSTEM "AAA-DA10000-0-U8025-00514-A-04-1.SVG" NDATA svg>
]>
<dmodule>
<content>
<graphic  info="AAA-DA10000-0-U8025-00514-A-04-1"/>
</content>
</dmodule>

xml的实体引用，如何用xmldoucument或者其他方法读取。麻烦使用c#。

 XmlTextReader reader = new XmlTextReader(xml文件名);
reader.EntityHandling = EntityHandling.ExpandCharEntities;
XmlDocument doc = new XmlDocument();
doc.Load(reader);

List<XmlEntityReference> entityRefs = new List<XmlEntityReference>();
RetrieveEntityRefs(doc.DocumentElement, doc, entityRefs);

private void RetrieveEntityRefs(XmlNode parentNode, XmlDocument doc, List<XmlEntityReference> entityReferences) {
    foreach (XmlNode node in parentNode.ChildNodes)
    {
        if (node.NodeType == XmlNodeType.EntityReference) {
            XmlEntityReference entityRef = node as XmlEntityReference;
            entityReferences.Add(entityRef);
        }
        else if (node.HasChildNodes) {
            RetrieveEntityRefs(node, doc, entityReferences);
        }
    }
}