默认情况下延迟加载是关闭的，但这个属性可以自定义修改。
Lazy loading is turned off by default but this setting can be customized.
在延迟加载的情况下，只要访问导航属性并且相关对象尚未加载，就会建立此连接。
In the case of lazy loading, this connection occurs whenever a navigation property is accessed and the related object is not already loaded.
如果属性表示关联或链接或者延迟属性，则调用此方法时，将会向客户端提供一种惰式加载相关资源的方式。
If the property represents an association or link or a deferred property, calling this method provides the client with a way to lazily load related resources.
如果属性表示关联、链接或延迟属性，则调用此方法时，将会向客户端提供一种惰式加载相关资源的方式。
If the property represents an association, link or deferred property, calling this method provides the client a way to lazily load related resources.
如果属性表示关联、链接或延迟属性，则调用此方法时，将会向客户端提供一种惰式加载相关资源的方式。
If the property represents an association, link or deferred property, calling this method provides the client a way to lazily load related resources.
应用推荐