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<?xml version="1.0" encoding="UTF-8"?>
<evjen>
<subscription-update>
<odds-model-object-changed typeId="aaa" id="1214033306">
<properties>
<property name="a1">2009-09-04 05:34:50.498</property>
<property name="a2">67.0</property>
</properties>
</odds-model-object-changed>
<odds-model-object-deleted typeId="aaa" id="1215932285"></odds-model-object-deleted>
<odds-model-object-deleted typeId="aaa" id="1215932278"></odds-model-object-deleted>
<odds-model-object-created>
<odds-model-object typeId="aaa" id="1215580620">
<properties>
<property name="a3">1.77</property>
<property name="a4">1</property>
<property name="a5">2009-09-04 05:35:10.834</property>
</properties>
</odds-model-object>
</odds-model-object-created>
</subscription-update>
</evjen>
如果某个节点不存在,那么负责读取这个节点的线程就退出此次读取...
XPathDocument doc = new XPathDocument("books.xml");
XPathNavigator nav = ((IXPathNavigable)doc).CreateNavigator();