Unpackaged WinUI3 throws Exception thrown: 'System.Runtime.InteropServices.COMException' in Microsoft.WindowsAppRuntime.Bootstrap.Net.dll

Question

I started the tutorial create-your-first-winui3-app

to try and create an unpackaged WinUI 3, as an option.

As far as I know I Have all the prerequisites, and templates installed for VS2022.

All I did was create a blank packed projects (as instructed), and added

<WindowsPackageType>None</WindowsPackageType>  

to the project file (and then unloaded and reloaded the project)

I then selected the unpacked debug option...

and then the application fails to run with the error

Exception thrown: 'System.Runtime.InteropServices.COMException' in Microsoft.WindowsAppRuntime.Bootstrap.Net.dll  

I get the following results looking for the SDK..

            PS C:\Users\peter> powershell -c get-appxpackage microsoft.win*app*run*  
	Name              : Microsoft.WindowsAppRuntime.1.0  
	Publisher         : CN=Microsoft Corporation, O=Microsoft Corporation, L=Redmond, S=Washington, C=US  
	Architecture      : X64  
	ResourceId        :  
	Version           : 0.319.455.0  
	PackageFullName   : Microsoft.WindowsAppRuntime.1.0_0.319.455.0_x64__8wekyb3d8bbwe  
	InstallLocation   : C:\Program Files\WindowsApps\Microsoft.WindowsAppRuntime.1.0_0.319.455.0_x64__8wekyb3d8bbwe  
	IsFramework       : True  
	PackageFamilyName : Microsoft.WindowsAppRuntime.1.0_8wekyb3d8bbwe  
	PublisherId       : 8wekyb3d8bbwe  
	IsResourcePackage : False  
	IsBundle          : False  
	IsDevelopmentMode : False  
	NonRemovable      : False  
	IsPartiallyStaged : False  
	SignatureKind     : Store  
	Status            : Ok  

	Name              : Microsoft.WindowsAppRuntime.1.0  
	Publisher         : CN=Microsoft Corporation, O=Microsoft Corporation, L=Redmond, S=Washington, C=US  
	Architecture      : X86  
	ResourceId        :  
	Version           : 3.469.1654.0  
	PackageFullName   : Microsoft.WindowsAppRuntime.1.0_3.469.1654.0_x86__8wekyb3d8bbwe  
	InstallLocation   : C:\Program Files\WindowsApps\Microsoft.WindowsAppRuntime.1.0_3.469.1654.0_x86__8wekyb3d8bbwe  
	IsFramework       : True  
	PackageFamilyName : Microsoft.WindowsAppRuntime.1.0_8wekyb3d8bbwe  
	PublisherId       : 8wekyb3d8bbwe  
	IsResourcePackage : False  
	IsBundle          : False  
	IsDevelopmentMode : False  
	NonRemovable      : False  
	IsPartiallyStaged : False  
	SignatureKind     : Store  
	Status            : Ok  

	  

So there seems to be two versions x86, and x64)

I get the error when selecting either x86 or x64 debuging.

Does anyone have any suggestions?

Thanks in advance

Answer 1

This seems the same problem as in this thread Windows App SDK - Exception Thrown
(Bootstrap is used to check the versions)