Any attempts to update properties result in a ReadOnlyPropertyException.

任何更新属性的企图都会导致抛出ReadOnlyPropertyException异常。

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Part 1 showed you how to set up a basic application in which an end user could view properties, and the administrator could add, remove, and update properties.

第 1 部分向您显示了如何安装一个基本的应用程序，在这个应用程序里面，终端用户可以查看属性，并且管理员可以添加、移除和更新属性。

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Listing 6 shows how to retrieve the document just created and update some of the properties.

清单6显示了如何检索刚刚创建的文档，以及如何更新某些属性。

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