Caching the connection reduces the setup time by avoiding the time to connect to the database (except for the first time).

高速缓存连接通过避免与数据库连接的时间(除了第一次)减少了设置时间。

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DbContext is a simplified version of ObjectContext, providing basic functionality for model caching, database provisioning, connection management, and schema creation. An example looks as following.

DbContext是ObjectContext的简化版本，提供了基本的模型缓存、数据库供应、连接管理及模式创建等功能。

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