fixup! Use Microsoft.CodeAnalysis.PublicApiAnalyzers to track public API surface

Author: RussKie

eng/ApiCompatibility/PublicApiAnalyzer.props

@@ -2,7 +2,16 @@
 
   <PropertyGroup Condition="'$(UsePublicApiAnalyzers)' == 'true'">
     <!-- https://github.com/dotnet/roslyn-analyzers/blob/main/src/PublicApiAnalyzers/Microsoft.CodeAnalysis.PublicApiAnalyzers.md -->
-    <WarningsAsErrors>$(WarningsAsErrors);RS0016;RS0017;RS0022;RS0024;RS0025;RS0026;RS0027;RS0036;RS0037</WarningsAsErrors>
+    <WarningsAsErrors>$(WarningsAsErrors);RS0016;RS0017;RS0022;RS0024;RS0025;RS0036;RS0037;RS0041;RS0048</WarningsAsErrors>
+
+    <!-- 
+      TODO: Enable the following:
+      * RS0026: Symbol 'XYZ' violates the backcompat requirement: 'Do not add multiple overloads with optional parameters'.
+        https://github.com/dotnet/extensions/issues/4167
+
+      * RS0027: 'XYZ' violates the backcompat requirement: 'API with optional parameter(s) should have the most parameters amongst its public overloads'.
+        https://github.com/dotnet/extensions/issues/4168
+    -->
   </PropertyGroup>
 
 </Project>

eng/ApiCompatibility/PublicApiAnalyzer.targets

@@ -6,8 +6,8 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
 
-    <AdditionalFiles Include="$(ProjectDir)PublicAPI.Shipped.txt" />
-    <AdditionalFiles Include="$(ProjectDir)PublicAPI.Unshipped.txt" />
+    <AdditionalFiles Include="$(ProjectDir)PublicAPI/$(TargetFramework)/PublicAPI.Shipped.txt" />
+    <AdditionalFiles Include="$(ProjectDir)PublicAPI/$(TargetFramework)/PublicAPI.Unshipped.txt" />
   </ItemGroup>
 
 </Project>