review feedback - preprocessor directive
review feedback - preprocessor directive

Co-authored-by: Rainer Sigwald <c47cb73c2e8e8aa2e5e1be22cd04a787a9ddce7f@microsoft.com>
cdmihai/msbuild,rainersigwald/msbuild,AndyGerlicher/msbuild,sean-gilliam/msbuild,rainersigwald/msbuild,AndyGerlicher/msbuild,AndyGerlicher/msbuild,cdmihai/msbuild,mono/msbuild,sean-gilliam/msbuild,sean-gilliam/msbuild,cdmihai/msbuild,mono/msbuild,rainersigwald/msbuild,mono/msbuild,rainersigwald/msbuild,sean-gilliam/msbuild,cdmihai/msbuild,AndyGerlicher/msbuild,mono/msbuild