Directory.build.targets

<Project>
  <PropertyGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
    <DefineConstants>$(DefineConstants);PORTABLE</DefineConstants>
  </PropertyGroup>
  <PropertyGroup Condition="'$(TargetFramework)' == 'net452'">
    <DefineConstants>$(DefineConstants);NET_461;XAML</DefineConstants>
  </PropertyGroup>
  <PropertyGroup Condition="'$(TargetFramework)' == 'uap10.0.16299'">
    <DefineConstants>$(DefineConstants);NETFX_CORE;XAML;WINDOWS_UWP</DefineConstants>
    <TargetPlatformVersion>10.0.16299.0</TargetPlatformVersion>
    <TargetPlatformMinVersion>10.0.16299.0</TargetPlatformMinVersion>
  </PropertyGroup>
  <PropertyGroup Condition="'$(TargetFramework)' == 'Xamarin.iOS10'">
    <DefineConstants>$(DefineConstants);MONO;UIKIT;COCOA</DefineConstants>
  </PropertyGroup>
   <PropertyGroup Condition="'$(TargetFramework)' == 'Xamarin.Mac20'">
    <DefineConstants>$(DefineConstants);MONO;COCOA</DefineConstants>
  </PropertyGroup>
  <PropertyGroup Condition="'$(TargetFramework)' == 'Xamarin.TVOS10'">
    <DefineConstants>$(DefineConstants);MONO;COCOA</DefineConstants>
  </PropertyGroup>
  <PropertyGroup Condition="'$(TargetFramework)' == 'Xamarin.WatchOS10'">
    <DefineConstants>$(DefineConstants);MONO;COCOA</DefineConstants>
  </PropertyGroup>
  <PropertyGroup Condition="'$(TargetFramework)' == 'MonoAndroid80'">
    <DefineConstants>$(DefineConstants);MONO;ANDROID</DefineConstants>
    <MonoAndroidResourcePrefix>Resources</MonoAndroidResourcePrefix>
    <AndroidResgenClass>Resource</AndroidResgenClass>
    <AndroidResgenFile>Resources\Resource.designer.cs</AndroidResgenFile>
  </PropertyGroup>
  <PropertyGroup Condition="'$(TargetFramework)' == 'netcoreapp2.0'">
  </PropertyGroup>
  
  <ItemGroup Condition=" '$(TargetFramework)' == 'uap10.0.16299' and '$(IsLibraryProject)' == 'true' ">
    <PackageReference Include="Microsoft.NETCore.UniversalWindowsPlatform" Version="6.0.6" />
  </ItemGroup>
</Project>