Directory.Build.targets

<Project>

  <Import Project="$(WpfArcadeSdkTargets)"
          Condition="Exists('$(WpfArcadeSdkProps)') And Exists('$(WpfArcadeSdkTargets)')"/>

  <Import Sdk="Microsoft.DotNet.Arcade.Wpf.Sdk"
          Project="Sdk.targets"
          Condition="!Exists('$(WpfArcadeSdkProps)') Or !Exists('$(WpfArcadeSdkTargets)')"/>
</Project>