C++中结构体 A = {sizeof(A)}如何在C#中定义?

C++中是这样定义的 NET_CTRL_SET_BYPASS stuSetBypass = {sizeof(stuSetBypass)};我想在C#中定义,如:

NET_CTRL_SET_BYPASS stuSetBypass = new NET_CTRL_SET_BYPASS(sizeof(**stuSetBypas**));

这是我自己在C#中定义的,但是出错。错误提示:未能找到类型或命名空间名称"stuSetBypass"(是否缺少指令或程序集引用) 。粗体就是错误来源。
求大神解答下。

NET_CTRL_SET_BYPASS stuSetBypass = new NET_CTRL_SET_BYPASS(sizeof(NET_CTRL_SET_BYPASS));
看看呢

一楼肯定没错,看看c语言