所有长期服务持续性提供者，都衍生自此抽象基底类别。
The abstract base class from which all durable service persistence providers that implement locking are derived.
例如，成员资格功能使用提供者，以协调资料库中成员资格资料的持续性。
For example, the membership feature USES a provider to coordinate the persistence of membership data in a database.
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