From 8f542ce3a2b28b554dd748aa7f45e45287e80a51 Mon Sep 17 00:00:00 2001
From: Matthew Leibowitz <mattleibow@live.com>
Date: Thu, 28 May 2026 01:23:00 +0200
Subject: [PATCH] Fix WinUI Projection DLL not found for .NET 9 consumers

The NativeAssets.WinUI package placed the Projection DLL only in the
net10.0-windows folder (WindowsTargetFrameworksCurrent). Since NuGet
won't serve a higher TFM asset to a lower TFM consumer, .NET 9 apps
couldn't resolve the assembly at runtime, causing FileNotFoundException.

Fix by including the Projection DLL in ALL supported TFMs (both Current
and Previous), ensuring every consumer TFM gets the assembly. This
mirrors the pattern where lib/ placeholders exist for each TFM.

Fixes #4082

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
---
 .../SkiaSharp.NativeAssets.WinUI.csproj                        | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/binding/SkiaSharp.NativeAssets.WinUI/SkiaSharp.NativeAssets.WinUI.csproj b/binding/SkiaSharp.NativeAssets.WinUI/SkiaSharp.NativeAssets.WinUI.csproj
index a88a353faf1..7fe11ddacc0 100644
--- a/binding/SkiaSharp.NativeAssets.WinUI/SkiaSharp.NativeAssets.WinUI.csproj
+++ b/binding/SkiaSharp.NativeAssets.WinUI/SkiaSharp.NativeAssets.WinUI.csproj
@@ -7,10 +7,13 @@
   </PropertyGroup>
   <ItemGroup>
     <NativeAssetPackageFile Include="..\..\output\native\winui\any\*" RuntimeIdentifier="win-x64" Folder="lib\$(WindowsTargetFrameworksCurrent)" />
+    <NativeAssetPackageFile Include="..\..\output\native\winui\any\*" RuntimeIdentifier="win-x64" Folder="lib\$(WindowsTargetFrameworksPrevious)" />
     <NativeAssetPackageFile Include="..\..\output\native\winui\x64\*" RuntimeIdentifier="win-x64" />
     <NativeAssetPackageFile Include="..\..\output\native\winui\any\*" RuntimeIdentifier="win-x86" Folder="lib\$(WindowsTargetFrameworksCurrent)" />
+    <NativeAssetPackageFile Include="..\..\output\native\winui\any\*" RuntimeIdentifier="win-x86" Folder="lib\$(WindowsTargetFrameworksPrevious)" />
     <NativeAssetPackageFile Include="..\..\output\native\winui\x86\*" RuntimeIdentifier="win-x86" />
     <NativeAssetPackageFile Include="..\..\output\native\winui\any\*" RuntimeIdentifier="win-arm64" Folder="lib\$(WindowsTargetFrameworksCurrent)" />
+    <NativeAssetPackageFile Include="..\..\output\native\winui\any\*" RuntimeIdentifier="win-arm64" Folder="lib\$(WindowsTargetFrameworksPrevious)" />
     <NativeAssetPackageFile Include="..\..\output\native\winui\arm64\*" RuntimeIdentifier="win-arm64" />
   </ItemGroup>
 </Project>
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