VS Code and preprocessor defines

Hi,

I now work with VS Code. Its great.
I just have one missing feature if anyone knows how to fix it.
I would like it to understand #if preprocessor definitions.
EG: When I have some code like this and I work in Standalone Windows.

Code (CSharp):

1. #if UNITY_PS4
2. //hello ps4
3. #elif UNITY_STANDALONE
4. //hello pc
5. #endif

It does not gray out the PS4 code.
How can I do this?