Missing LibPostalNet-symbols.cpp file in LibPostalNet project

Hello, 

I am trying to run the LibPostalNet console project and always get a null result (Zero pointer at the result of the native call)

I observed that the LibPostalNet csproj has a missing reference to LibPostalNet-symbols.cpp

Shouldn't that file be also available in the folder?

The master repository does not include that.

Thanks,
Regards,
Vlad