当托管代码抛出异常时发生，在运行时在调用堆栈中搜索应用程序域中的异常处理程序之前。

Occurs when an exception is thrown in managed code, before the runtime searches the call stack for an exception handler in the application domain.

youdao

当托管代码抛出异常时发生，在运行时在调用堆栈中搜索应用程序域中的异常处理程序之前。

Occurs when an exception is thrown in managed code, before the runtime searches the call stack for an exception handler in the application domain.

youdao