这是因为被调用的其他对象可能和调用对象在同一时间被回收，例如公共语言运行时关闭这种情况。

This is because the other objects being called could be collected at the same time as the calling object, such as in the case of a common language runtime shutdown.

youdao

这是因为被调用的其他对象可能和调用对象在同一时间被回收，例如公共语言运行时关闭这种情况。

This is because the other objects being called could be collected at the same time as the calling object, such as in the case of a common language runtime shutdown.

youdao