Directory.Build.props

<Project>

  <!-- mono -->
  <PropertyGroup Condition="'$(OS)' == 'Unix'">
    <MonoRoot Condition="'$(MonoRoot)' == '' and $([MSBuild]::IsOsPlatform('Linux'))">/usr</MonoRoot>
    <MonoRoot Condition="'$(MonoRoot)' == '' and $([MSBuild]::IsOsPlatform('OSX'))">/Library/Frameworks/Mono.framework/Versions/Current</MonoRoot>
    <MonoLibFolder>$(MonoRoot)/lib/mono</MonoLibFolder>
    <MonoPackaging Condition="$(TargetFramework.StartsWith('net4'))">true</MonoPackaging>
    <FrameworkPathOverride Condition="'$(TargetFramework)' == 'net45'">$(MonoLibFolder)/4.5-api</FrameworkPathOverride>
    <FrameworkPathOverride Condition="'$(TargetFramework)' == 'net451'">$(MonoLibFolder)/4.5.1-api</FrameworkPathOverride>
    <FrameworkPathOverride Condition="'$(TargetFramework)' == 'net452'">$(MonoLibFolder)/4.5.2-api</FrameworkPathOverride>
    <FrameworkPathOverride Condition="'$(TargetFramework)' == 'net46'">$(MonoLibFolder)/4.6-api</FrameworkPathOverride>
    <FrameworkPathOverride Condition="'$(TargetFramework)' == 'net461'">$(MonoLibFolder)/4.6.1-api</FrameworkPathOverride>
    <FrameworkPathOverride Condition="'$(TargetFramework)' == 'net462'">$(MonoLibFolder)/4.6.2-api</FrameworkPathOverride>
    <FrameworkPathOverride Condition="'$(TargetFramework)' == 'net47'">$(MonoLibFolder)/4.7-api</FrameworkPathOverride>
    <FrameworkPathOverride Condition="'$(TargetFramework)' == 'net471'">$(MonoLibFolder)/4.7.1-api</FrameworkPathOverride>
    <FrameworkPathOverride Condition="'$(TargetFramework)' == 'net472'">$(MonoLibFolder)/4.7.2-api</FrameworkPathOverride>
  </PropertyGroup>

</Project>