Creating New Entity References
The CreateEntityReference method creates a new XmlEntityReference node. The XML Document Object Model (DOM) looks to see if the entity name being referenced has already been declared. If it has, the child nodes of XmlEntityReference node are copied from the entity declaration node. If there is no entity declaration that matches, an empty text node is attached as the only child of the entity reference node. Because the child nodes of the XmlEntityReference node are copies of other nodes, these child nodes are read-only and cannot be modified.
When the nodes are copied, there may be a namespace in scope at the point of the entity reference. This namespace affects the configuration of any element or attribute nodes generated.
Note
The DOM adds child nodes to the EntityReference only when you insert the EntityReference node to the document. Newly created EntityReference nodes have no child nodes.
Even though the XmlDataDocument is a derived class of the XmlDocument, the XmlDataDocument does not support the creation of entity references. This is because EntityReference children are read-only. The children of an EntityReference node can span more than one region. In this case, part of a row associated with the region that contains a part of an EntityReference will be read-only.
