Use C# projects at the same time on Windows and Mac (and even Linux)

Directory.Build.props

<?xml version="1.0" encoding="utf-8"?>
<Project>
    <Choose>
        <When Condition="'$(OS)' == 'Windows_NT'">
            <PropertyGroup>
                <BaseIntermediateOutputPath>B:/$(MSBuildProjectFile) Intermediate/</BaseIntermediateOutputPath>
                <OutputPath>B:/$(MSBuildProjectFile) Output/$(Configuration)/</OutputPath>
            </PropertyGroup>
        </When>
        <Otherwise>
            <PropertyGroup>
                <BaseIntermediateOutputPath>/Volumes/ramdisk/$(MSBuildProjectFile) Intermediate/</BaseIntermediateOutputPath>
                <OutputPath>/Volumes/ramdisk/$(MSBuildProjectFile) Output/$(Configuration)/</OutputPath>
            </PropertyGroup>
        </Otherwise>
    </Choose>
</Project>