TestNetTaskResourceCallback.csproj

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>$(LatestDotNetCoreForMSBuild)</TargetFramework>
  </PropertyGroup>

  <PropertyGroup>
    <TestProjectFolder>$([System.IO.Path]::GetFullPath('$([System.IO.Path]::Combine('$(MSBuildThisFileDirectory)', '..', '..', '..', '..'))'))</TestProjectFolder>
    <ExampleTaskPath>$([System.IO.Path]::Combine('$(TestProjectFolder)', '$(TargetFramework)', 'ExampleTask.dll'))</ExampleTaskPath>
  </PropertyGroup>

  <UsingTask
      TaskName="Microsoft.Build.UnitTests.BackEnd.RequestCoresTask"
      AssemblyFile="$(ExampleTaskPath)"
      TaskFactory="TaskHostFactory"
      Runtime="NET"/>

  <Target Name="TestTask" BeforeTargets="Build">
    <Microsoft.Build.UnitTests.BackEnd.RequestCoresTask CoreCount="2" ReleaseAfter="true">
      <Output PropertyName="Granted" TaskParameter="GrantedCores" />
    </Microsoft.Build.UnitTests.BackEnd.RequestCoresTask>
    <Message Text="CallbackResult: RequestCores(2) = $(Granted)" Importance="high" />
  </Target>

</Project>