How to use custom preprocessor directives in .Net Core

Question

I am trying to use a preprocessor directive in .Net core, but I can\'t determine the correct way to get the directive to be set:

static void Main(string[] ar         


        

Answer 1

The thing you need to set is /p:DefineConstants=MAC note this will override constants set in the project like DEBUG or TRACE that may be set so the full version you would likely use would be

for a debug build

dotnet msbuild /p:DefineConstants=TRACE;DEBUG;NETCOREAPP1_1;MAC /p:Configuration=Debug

and for a release build

dotnet msbuild /p:DefineConstants=TRACE;NETCOREAPP1_1;MAC /p:Configuration=Release

An easier solution would create a configuration called Mac and in your csproj have

  
    TRACE;NETCOREAPP1_1;MAC
  

Then from the command line you just need to do

dotnet msbuild /p:Configuration=Mac