据我所知使用NETFX_CORE指令，像这样的：

I understand using the NETFX_CORE directive, like this:

#if NETFX_CORE 
    // Windows 8
#else 
    // Windows Phone 8
#endif

更多信息：的http://msdn.microsoft.com/en-us/library/windowsphone/develop/jj714084(v=vs.105).aspx

但有一个特定的指令到Windows Phone 8？

But is there a directive specific to Windows Phone 8?

推荐答案

是的，Windows Phone的指令是：

Yes, the Windows Phone directive is:

#if WINDOWS_PHONE

这是记载这里，但我很惊讶，它没有提到here.我还测试了这款在一些code，和它的作品。

This is documented here, but I'm surprised that it isn't mentioned here. I also tested this in some code, and it works.