Build lib/ compile reference as AnyCPU MSIL (v0.1.5)

Adds AnyCPU to the Platforms list of both .WinAppSdk csprojs and
points the lib\net10.0-windows10.0.19041.0 entries in both nuspecs at
the AnyCPU build output (bin\Release\, by SDK convention). The
per-arch runtimes\win-x64\ and runtimes\win-arm64\ payloads are kept
as-is so actual runtime behavior is unchanged.

Eliminates MSB3270 / CS8012 warnings in consumer projects that build
for ARM64 (or any platform other than x64) and reference these
packages. Verified by overlaying the AnyCPU DLLs onto a consumer's
package cache and rebuilding -- warning count drops from N to 0.

CI workflow gets a new AnyCPU build step before the x64 / ARM64
builds so nuget pack finds the MSIL DLL at bin\Release\.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: arcadiogarcia

.github/workflows/release.yml

@@ -72,6 +72,19 @@ jobs:
           Write-Host "PRI DLL exists: $(Test-Path "$appxPath\Microsoft.Build.Packaging.Pri.Tasks.dll")"
           "APPX_PATH=$appxPath" >> $env:GITHUB_OUTPUT
 
+      - name: Restore & Build WinAppSdk library (AnyCPU - for lib/ compile ref)
+        shell: pwsh
+        run: |
+          # AnyCPU produces an MSIL (Machine=Intel-386, IL-only) binary that
+          # both nuspecs use as the compile-time reference under lib/net10.0,
+          # so consumers building for x64/ARM64 don't see MSB3270/CS8012.
+          dotnet restore src/CompositionCollectionView.WinAppSdk/CompositionCollectionView.WinAppSdk.csproj -p:Platform=AnyCPU
+          dotnet build src/CompositionCollectionView.WinAppSdk/CompositionCollectionView.WinAppSdk.csproj `
+            -c Release `
+            --no-restore `
+            -p:Platform=AnyCPU `
+            "-p:AppxMSBuildToolsPath=${{ steps.appx.outputs.APPX_PATH }}\"
+
       - name: Restore & Build WinAppSdk library (x64)
         shell: pwsh
         run: |

CompositionCollectionView.nuspec

@@ -29,11 +29,15 @@
     <file src="src\CompositionCollectionView\bin\Release\CompositionCollectionView.pri" target="lib\uap10.0.19041" />
     <file src="src\CompositionCollectionView\bin\Release\CompositionCollectionView\**" target="lib\uap10.0.19041\CompositionCollectionView" />
 
-    <!-- WinUI 3 / Windows App SDK – compile reference + resources (net10.0-windows10.0.19041.0) -->
-    <file src="src\CompositionCollectionView.WinAppSdk\bin\x64\Release\net10.0-windows10.0.19041.0\CompositionCollectionView.dll" target="lib\net10.0-windows10.0.19041.0" />
-    <file src="src\CompositionCollectionView.WinAppSdk\bin\x64\Release\net10.0-windows10.0.19041.0\CompositionCollectionView.xml" target="lib\net10.0-windows10.0.19041.0" />
-    <file src="src\CompositionCollectionView.WinAppSdk\bin\x64\Release\net10.0-windows10.0.19041.0\CompositionCollectionView.pri" target="lib\net10.0-windows10.0.19041.0" />
-    <file src="src\CompositionCollectionView.WinAppSdk\bin\x64\Release\net10.0-windows10.0.19041.0\CompositionCollectionView\**" target="lib\net10.0-windows10.0.19041.0\CompositionCollectionView" />
+    <!-- WinUI 3 / Windows App SDK – compile reference + resources (net10.0-windows10.0.19041.0)
+         Sourced from the AnyCPU (MSIL) build so consumers targeting any
+         processor architecture don't get MSB3270/CS8012 warnings. AnyCPU
+         builds collapse `bin\AnyCPU\` to plain `bin\` by SDK convention.
+         The per-arch runtime payloads below are still architecture-specific. -->
+    <file src="src\CompositionCollectionView.WinAppSdk\bin\Release\net10.0-windows10.0.19041.0\CompositionCollectionView.dll" target="lib\net10.0-windows10.0.19041.0" />
+    <file src="src\CompositionCollectionView.WinAppSdk\bin\Release\net10.0-windows10.0.19041.0\CompositionCollectionView.xml" target="lib\net10.0-windows10.0.19041.0" />
+    <file src="src\CompositionCollectionView.WinAppSdk\bin\Release\net10.0-windows10.0.19041.0\CompositionCollectionView.pri" target="lib\net10.0-windows10.0.19041.0" />
+    <file src="src\CompositionCollectionView.WinAppSdk\bin\Release\net10.0-windows10.0.19041.0\CompositionCollectionView\**" target="lib\net10.0-windows10.0.19041.0\CompositionCollectionView" />
 
     <!-- WinUI 3 / Windows App SDK – x64 runtime -->
     <file src="src\CompositionCollectionView.WinAppSdk\bin\x64\Release\net10.0-windows10.0.19041.0\CompositionCollectionView.dll" target="runtimes\win-x64\lib\net10.0-windows10.0.19041.0" />

CompositionExpressions.nuspec

@@ -27,9 +27,13 @@
          the .xml below. -->
     <file src="src\CompositionExpressions\bin\Release\CompositionExpressions.dll" target="lib\uap10.0.19041" />
 
-    <!-- WinUI 3 / Windows App SDK – compile reference (net10.0-windows10.0.19041.0) -->
-    <file src="src\CompositionExpressions.WinAppSdk\bin\x64\Release\net10.0-windows10.0.19041.0\CompositionExpressions.dll" target="lib\net10.0-windows10.0.19041.0" />
-    <file src="src\CompositionExpressions.WinAppSdk\bin\x64\Release\net10.0-windows10.0.19041.0\CompositionExpressions.xml" target="lib\net10.0-windows10.0.19041.0" />
+    <!-- WinUI 3 / Windows App SDK – compile reference (net10.0-windows10.0.19041.0)
+         Sourced from the AnyCPU (MSIL) build so consumers targeting any
+         processor architecture don't get MSB3270/CS8012 warnings. AnyCPU
+         builds collapse `bin\AnyCPU\` to plain `bin\` by SDK convention.
+         The per-arch runtime payloads below are still architecture-specific. -->
+    <file src="src\CompositionExpressions.WinAppSdk\bin\Release\net10.0-windows10.0.19041.0\CompositionExpressions.dll" target="lib\net10.0-windows10.0.19041.0" />
+    <file src="src\CompositionExpressions.WinAppSdk\bin\Release\net10.0-windows10.0.19041.0\CompositionExpressions.xml" target="lib\net10.0-windows10.0.19041.0" />
 
     <!-- WinUI 3 / Windows App SDK – x64 runtime -->
     <file src="src\CompositionExpressions.WinAppSdk\bin\x64\Release\net10.0-windows10.0.19041.0\CompositionExpressions.dll" target="runtimes\win-x64\lib\net10.0-windows10.0.19041.0" />

src/CompositionCollectionView.WinAppSdk/CompositionCollectionView.WinAppSdk.csproj

@@ -11,7 +11,11 @@
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <ImplicitUsings>enable</ImplicitUsings>
     <UseWinUI>true</UseWinUI>
-    <Platforms>x86;x64;ARM64</Platforms>
+    <!-- AnyCPU is added so the nuspec's lib\net10.0 compile-time reference can
+         be sourced from an AnyCPU (MSIL) build, avoiding MSB3270/CS8012
+         warnings in consumers that target a different architecture. The
+         per-arch runtimes\win-* payloads remain platform-specific. -->
+    <Platforms>AnyCPU;x86;x64;ARM64</Platforms>
     <RuntimeIdentifiers>win-x86;win-x64;win-arm64</RuntimeIdentifiers>
     <DefineConstants>$(DefineConstants);WINAPPSDK</DefineConstants>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>

src/CompositionExpressions.WinAppSdk/CompositionExpressions.WinAppSdk.csproj

@@ -10,7 +10,11 @@
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <ImplicitUsings>enable</ImplicitUsings>
     <UseWinUI>false</UseWinUI>
-    <Platforms>x86;x64;ARM64</Platforms>
+    <!-- AnyCPU is added so the nuspec's lib\net10.0 compile-time reference can
+         be sourced from an AnyCPU (MSIL) build, avoiding MSB3270/CS8012
+         warnings in consumers that target a different architecture. The
+         per-arch runtimes\win-* payloads remain platform-specific. -->
+    <Platforms>AnyCPU;x86;x64;ARM64</Platforms>
     <RuntimeIdentifiers>win-x86;win-x64;win-arm64</RuntimeIdentifiers>
     <DefineConstants>$(DefineConstants);WINAPPSDK</DefineConstants>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>