Visual studio 2015 compile error: CS0570 is not supported by the language

[Yi HAN]

Hi Guys, 

I posted a question on stackoverflow concerning compiling c++  lib & its wrapper c#. Nobody seem to be interested or/and capable to give a solution on it.

the post:

http://stackoverflow.com/questions/32051213/visual-studio-2015-compile-error-cs0570-is-not-supported-by-the-language

If you guys have a solution on this, I will very much appreciate.

Thanks folks.

in attachments, 

- c++ code 

- c++ proj build output

- c# wrapper proj build output

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Yi HAN