这种行为是由公共语言架构(Common Language Infrastructure,CLI)规范导致的，该规范确保一个类型构造函数只执行一次，除非用户代码进行显式调用。

This comes from the Common Language Infrastructure (CLI) spec that guarantees a type constructor will execute only once, unless explicitly invoked by user code.

youdao

这种行为是由公共语言架构(Common Language Infrastructure,CLI)规范导致的，该规范确保一个类型构造函数只执行一次，除非用户代码进行显式调用。

This comes from the Common Language Infrastructure (CLI) spec that guarantees a type constructor will execute only once, unless explicitly invoked by user code.

youdao