fix build. but the tests are not running yet

build/version.props

@@ -22,6 +22,8 @@
 
     <MicrosoftNETestSdkVersion>15.9.0</MicrosoftNETestSdkVersion>
     <XUnitVersion>2.4.1</XUnitVersion>
+    <XUnitAbstractionsVersion>2.0.3</XUnitAbstractionsVersion>
+    <XUnitCoreVersion>2.4.1</XUnitCoreVersion>
     <XUnitRunnerVisualStudioVersion>2.4.1</XUnitRunnerVisualStudioVersion>
   </PropertyGroup>
 </Project>

test/Microsoft.IIS.Administration.Tests/Microsoft.IIS.Administration.Tests.csproj

@@ -24,11 +24,12 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="$(MicrosoftNETestSdkVersion)" />
+    <PackageReference Include="xunit" Version="$(XUnitVersion)" />
     <PackageReference Include="xunit.runner.visualstudio" Version="$(XUnitRunnerVisualStudioVersion)">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="xunit" Version="$(XUnitVersion)" />
+    <PackageReference Include="xunit.abstractions" Version="$(XUnitAbstractionsVersion)" />
     <PackageReference Include="System.Net.NetworkInformation" Version="$(SystemNetNetworkInformationVersion)" />
     <PackageReference Include="System.ServiceProcess.ServiceController" Version="$(SystemServiceProcessServiceControllerVersion)" />
   </ItemGroup>