Fix WinUI Projection DLL not resolved for .NET 9 consumers on Windows#4084
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📦 Try the packages from this PRWarning Do not run these scripts without first reviewing the code in this PR. Step 1 — Download the packages bash / macOS / Linux: curl -fsSL https://raw.githubusercontent.com/mono/SkiaSharp/main/scripts/get-skiasharp-pr.sh | bash -s -- 4084PowerShell / Windows: iex "& { $(irm https://raw.githubusercontent.com/mono/SkiaSharp/main/scripts/get-skiasharp-pr.ps1) } 4084"Step 2 — Add the local NuGet source dotnet nuget add source ~/.skiasharp/hives/pr-4084/packages --name skiasharp-pr-4084More options
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The NativeAssets.WinUI package placed the Projection DLL only in the net10.0-windows folder (WindowsTargetFrameworksCurrent). Since NuGet won't serve a higher TFM asset to a lower TFM consumer, .NET 9 apps couldn't resolve the assembly at runtime, causing FileNotFoundException. Fix by including the Projection DLL in ALL supported TFMs (both Current and Previous), ensuring every consumer TFM gets the assembly. This mirrors the pattern where lib/ placeholders exist for each TFM. Fixes #4082 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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[3.119.x] Fix WinUI Projection DLL not resolved for .NET 9 consumers on Windows (#4086) Fixes: #4082 Cherry-pick of: #4084 Backport of the same fix to the 3.119.x release branch. The Projection DLL was only placed in `runtimes/win-{arch}/lib/net10.0-windows10.0.19041.0/`, which NuGet won't serve to net9 consumers. .NET 9 apps hit a `FileNotFoundException` for `SkiaSharp.Views.WinUI.Native.Projection` at startup. Include the Projection DLL in both the `$(WindowsTargetFrameworksCurrent)` (net10.0) and `$(WindowsTargetFrameworksPrevious)` (net9.0) runtime folders so NuGet resolves it for both .NET 9 and .NET 10 consumers. Co-authored-by: Matthew Leibowitz <mattleibow@live.com> Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Summary
Fixes #4082 —
SkiaSharp.Views.WinUI.Native.Projectionassembly not found at runtime on Windows for .NET 9 apps (v3.119.4+).Root Cause
When the primary TFM moved from
net8.0tonet10.0(TFMCurrent), theNativeAssetPackageFileentries inSkiaSharp.NativeAssets.WinUI.csprojplaced the Projection DLL only into:NuGet's TFM resolution won't serve a
net10.0asset to anet9.0consumer (higher TFM isn't backward-compatible), so .NET 9 apps get aFileNotFoundExceptionat runtime.In v3.119.2 (TFMCurrent=net8.0): The DLL was in
runtimes/win-{arch}/lib/net8.0-windows10.0.19041.0/— accessible to both net8 and net9 consumers.Fix
Include the Projection DLL in all supported Windows TFM folders (
WindowsTargetFrameworksCurrentandWindowsTargetFrameworksPrevious), so the NuGet package serves it to both .NET 9 and .NET 10 consumers.Resulting package layout:
Testing