This is possible because the system is constantly tracking the state of his transactions.
这是可以实现的，因为系统会不断地跟踪他的会话的状态。
The application is responsible for tracking its own state.
应用程序负责跟踪它自己的状态。
Deleted elements are allowed only when the state manager is already tracking the relationship instance.
仅当状态管理器正在跟踪关系实例时，才允许已删除的元素。
Identity Resolution, State Management, and Change Tracking (entity Framework).
标识解析、状态管理和更改跟踪(实体框架)。
Identity Resolution, State Management, and Change Tracking (entity Framework).
标识解析、状态管理和更改跟踪(实体框架)。
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