Error when running a WinUI Unpackaged app in Visual Studio 2022

[ward-horsfall]

Describe the bug

Hi,

When I try to run a WInUI app in Visual Studio 2022 Community Version 17.12.0 in "Unpackaged" mode I get the following error:

System.Runtime.InteropServices.COMException
HResult=0x80040154
Message=Class not registered (0x80040154 (REGDB_E_CLASSNOTREG))
Source=System.Private.CoreLib
StackTrace:
at System.Runtime.InteropServices.Marshal.ThrowExceptionForHR(Int32 errorCode)
at WinRT.ActivationFactory.Get(String typeName, Guid iid)
at Microsoft.UI.Xaml.Application.get__objRef_global__Microsoft_UI_Xaml_IApplicationStatics()
at Microsoft.UI.Xaml.Application.Start(ApplicationInitializationCallback callback)
at App4.Program.Main(String[] args) in G:\Data\Users\Ward\Documents\Visual_Studio_Projects\App4\obj\x64\Debug\net8.0-windows10.0.19041.0\win-x64\App.g.i.cs:line 26

This happens if I have it set to either x86 / x64.

The project type I create is: "Blank App, Packaged (WinUI 3 in Desktop)"

Note If I run it as a packaged app it runs without issue.

Thanks
Ward

Steps to reproduce the bug

In Visual Studio 2022 - create a project of type: "Blank App, Packaged (WinUI 3 in Desktop)".

Then set the package type to: (Unpackaged)

Expected behavior

No response

Screenshots

No response

NuGet package version

None

Windows version

No response

Additional context

No response

[castorix]

There must be, in the Project file :

<WindowsPackageType>None</WindowsPackageType>