NETFX 4.8.1: Arm64 compiled WPF applications attempt to load x64 wpfgfx_v0400.dll

[snickler]

• .NET Core Version: N/A
• Windows version: Windows 11 22543.1000 Arm64
• Does the bug reproduce also in WPF for .NET Framework 4.8?: Yes. 4.8.9014.0
• Is this bug related specifically to tooling in Visual Studio (e.g. XAML Designer, Code editing, etc...)? No
• Security issues and bugs should be reported privately, learn more via our responsible disclosure guidelines.

Problem description:
Creating a blank WPF application targeting .NET Framework 4.8 and compiled for Arm64 will crash when loading the WpfGfx native library.

Actual behavior:

The NativeWPFDLLLoader in PresentationCore.dll incorrectly tries to load the wpfgfx_v0400.dll from Framework64 instead of FrameworkArm64.

Stack Trace from debugging in dnSpy

{System.DllNotFoundException: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\WPF\wpfgfx_v0400.dll ---> System.ComponentModel.Win32Exception: %1 is not a valid Win32 application
   --- End of inner exception stack trace ---
   at MS.Internal.NativeWPFDLLLoader.LoadNativeWPFDLL(UInt16* relDllPath, UInt16* baseDllPath)
   at MS.Internal.NativeWPFDLLLoader.LoadCommonDLLsAndDwrite()
   at CModuleInitialize.{ctor}(CModuleInitialize* , IntPtr cleaningUpFunc)
   at ?A0xe5657cc7.InitCmiStartupRunner()
   at ?A0xe5657cc7.??__E?A0xe5657cc7@unused@@YMXXZ()
   at _initterm_m((fnptr)* pfbegin, (fnptr)* pfend)
   at <CrtImplementationDetails>.LanguageSupport.InitializePerAppDomain(LanguageSupport* )
   at <CrtImplementationDetails>.LanguageSupport._Initialize(LanguageSupport* )
   at <CrtImplementationDetails>.LanguageSupport.Initialize(LanguageSupport* )}

Stack Trace from debugging in VS 2022

'WpfApp1.exe' (Win32): Loaded 'C:\Users\jerem\source\repos\WpfApp1\WpfApp1\bin\Debug\WpfApp1.exe'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\ntdll.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\mscoree.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\kernel32.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\KernelBase.dll'. 
The thread 0x4254 has exited with code 0 (0x0).
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\advapi32.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\msvcrt.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\sechost.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\rpcrt4.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\Microsoft.NET\FrameworkArm64\v4.0.30319\mscoreei.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\shlwapi.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\kernel.appcore.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\version.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\Microsoft.NET\FrameworkArm64\v4.0.30319\clr.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\user32.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\win32u.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\gdi32.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\vcruntime140_clr0400.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\gdi32full.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\ucrtbase_clr0400.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\msvcp_win.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\ucrtbase.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\imm32.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\combase.dll'. 
'WpfApp1.exe' (Win32): Unloaded 'C:\Windows\System32\combase.dll'
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\psapi.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\assembly\NativeImages_v4.0.30319_ARM64\mscorlib\4dffdcc6cf279e4492a61d32b5e6aa1f\mscorlib.ni.dll'. 
'WpfApp1.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\WINDOWS\Microsoft.Net\assembly\GAC_ARM64\mscorlib\v4.0_4.0.0.0__b77a5c561934e089\mscorlib.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\ole32.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\combase.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\bcryptprimitives.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\uxtheme.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\assembly\NativeImages_v4.0.30319_ARM64\System\8ddd8f2f6cbf456f5587b49bb9f6b266\System.ni.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\assembly\NativeImages_v4.0.30319_ARM64\WpfApp1\7779bee82bc15d021758dc3d49204f91\WpfApp1.ni.exe'. 
'WpfApp1.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\jerem\source\repos\WpfApp1\WpfApp1\bin\Debug\WpfApp1.exe'. Symbols loaded.
'WpfApp1.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System\v4.0_4.0.0.0__b77a5c561934e089\System.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\assembly\NativeImages_v4.0.30319_ARM64\System.Core\690159aace5f01042431a7e46d66a993\System.Core.ni.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\assembly\NativeImages_v4.0.30319_ARM64\WindowsBase\275f554bfad70b847a9a483b60b48b2b\WindowsBase.ni.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\cryptsp.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\rsaenh.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\cryptbase.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\bcrypt.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\assembly\NativeImages_v4.0.30319_ARM64\PresentationCore\076f5a832c6e2728092fd7baccf62210\PresentationCore.ni.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\assembly\NativeImages_v4.0.30319_ARM64\Presentatio5ae0f00f#\29216d2b932a993ddfae1f43e21cfe38\PresentationFramework.ni.dll'. 
'WpfApp1.exe' (CLR v4.0.30319: WpfApp1.exe): Loaded 'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\PresentationFramework\v4.0_4.0.0.0__31bf3856ad364e35\PresentationFramework.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp1.exe' (CLR v4.0.30319: WpfApp1.exe): Loaded 'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\WindowsBase\v4.0_4.0.0.0__31bf3856ad364e35\WindowsBase.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp1.exe' (CLR v4.0.30319: WpfApp1.exe): Loaded 'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Core\v4.0_4.0.0.0__b77a5c561934e089\System.Core.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp1.exe' (CLR v4.0.30319: WpfApp1.exe): Loaded 'C:\WINDOWS\Microsoft.Net\assembly\GAC_ARM64\PresentationCore\v4.0_4.0.0.0__31bf3856ad364e35\PresentationCore.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\assembly\NativeImages_v4.0.30319_ARM64\System.Xaml\2d301309c3d2584402ecaba90c76b74d\System.Xaml.ni.dll'. 
'WpfApp1.exe' (CLR v4.0.30319: WpfApp1.exe): Loaded 'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Xaml\v4.0_4.0.0.0__b77a5c561934e089\System.Xaml.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\Microsoft.NET\FrameworkArm64\v4.0.30319\clrjit.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\System32\DWrite.dll'. 
'WpfApp1.exe' (Win32): Loaded 'C:\Windows\Microsoft.NET\Framework64\v4.0.30319\WPF\wpfgfx_v0400.dll'. 
'WpfApp1.exe' (Win32): Unloaded 'C:\Windows\Microsoft.NET\Framework64\v4.0.30319\WPF\wpfgfx_v0400.dll'
Exception thrown at 0x00007FFD0B49CA44 in WpfApp1.exe: Microsoft C++ exception: [rethrow] at memory location 0x0000000000000000.
Exception thrown at 0x00007FFD0B49CA44 in WpfApp1.exe: Microsoft C++ exception: [rethrow] at memory location 0x0000000000000000.
An unhandled exception of type 'System.TypeInitializationException' occurred in Unknown Module.
The type initializer for '<Module>' threw an exception.

Expected behavior:

The Native Arm64 WPF Libraries should be loaded when the process architecture is Arm64.

Minimal repro:

1. Create a blank WPF (.NET Framework) application in Visual Studio 2022 (probably even 2019)
2. Edit .csproj to change Platform to arm64, or manually build project with msbuild and set /platform:arm64.
3. Run generated executable on an Arm64 device and reproduce crash behavior.

[snickler]

Hello, I was wondering if there were any updates on this? @singhashish-wpf @dipeshmsft

[dipeshmsft]

@snickler , we are still looking into this issue.

[snickler]

Awesome, thanks @dipeshmsft !

[snickler]

As of Windows 11 Dev Channel build 22563 + .NET 4.8.9022.1, this is resolved! \o/