Configurations.props

<Project>
  <!-- Honor the generic RuntimeConfiguration property. -->
  <PropertyGroup>
    <RuntimeConfiguration Condition="'$(RuntimeConfiguration)' == ''">$(Configuration)</RuntimeConfiguration>
    <RuntimeConfiguration Condition="'$(RuntimeConfiguration)' == '' AND ('$(Configuration)' == 'Debug' OR '$(Configuration)' == 'Release')">$(Configuration)</RuntimeConfiguration>
    <RuntimeConfiguration Condition="'$(RuntimeConfiguration)' == ''">Debug</RuntimeConfiguration>
    <CoreCLRConfiguration Condition="'$(CoreCLRConfiguration)' == ''">$(RuntimeConfiguration)</CoreCLRConfiguration>
    <MonoConfiguration Condition="'$(MonoConfiguration)' == '' and '$(RuntimeConfiguration.ToLower())' != 'checked'">$(RuntimeConfiguration)</MonoConfiguration>
    <!-- There's no checked configuration on Mono. -->
    <MonoConfiguration Condition="'$(MonoConfiguration)' == '' and '$(RuntimeConfiguration.ToLower())' == 'checked'">Debug</MonoConfiguration>
    <LibrariesConfiguration Condition="'$(LibrariesConfiguration)' == ''">$(Configuration)</LibrariesConfiguration>
  </PropertyGroup>

  <PropertyGroup>
    <__TargetOS Condition="$([MSBuild]::IsOSPlatform('OSX'))">OSX</__TargetOS>
    <__TargetOS Condition="'$(__TargetOS)' == '' and $([MSBuild]::IsOSPlatform('FREEBSD'))">FreeBSD</__TargetOS>
    <__TargetOS Condition="'$(__TargetOS)' == '' and $([MSBuild]::IsOSPlatform('NETBSD'))">NetBSD</__TargetOS>
    <__TargetOS Condition="'$(__TargetOS)' == '' and $([MSBuild]::IsOSUnixLike())">Linux</__TargetOS>
    <__TargetOS Condition="'$(__TargetOS)' == '' and $([MSBuild]::IsOSPlatform('WINDOWS'))">Windows_NT</__TargetOS>
    <TargetOS Condition="'$(TargetOS)' == ''">$(__TargetOS)</TargetOS>
    <CoreCLRTargetOS Condition="'$(CoreCLRTargetOS)' == ''">$(TargetOS)</CoreCLRTargetOS>
    <MonoTargetOS Condition="'$(MonoTargetOS)' == ''">$(TargetOS)</MonoTargetOS>
    <LibrariesTargetOS Condition="'$(LibrariesTargetOS)' == ''">$(TargetOS)</LibrariesTargetOS>
  </PropertyGroup>
</Project>