序列化时，LINQ to XML尝试使用命名空间属性中指定的空间前置词进行序列化。

When serializing, LINQ to XML attempts to serialize with the namespace prefix specified in namespace attributes.

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当带更改摘要的数据对象序列化时，也将保存其相应的更改摘要，并能够使用该数据对象进行恢复。

When a DataObject with a change summary is serialized, the change summary is also saved and can be restored with the data object.

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