ClickOnce publication - App can't start - UIAutomationProvider reference issue

[Camille]

I've just published all my .Net 9 apps using ClickOnce, all of them are now broken !

Using the following Nuget : UI.for.WinForms.AllControls.Net90 version 2025.1.211

 

They all crash on startup with the following error :

Application: MyApp.exe
CoreCLR Version: 9.0.225.6610
.NET Version: 9.0.2
Description: The process was terminated due to an unhandled exception.
Exception Info: System.IO.FileNotFoundException: Could not load file or assembly 'UIAutomationProvider, Version=9.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. Le fichier spécifié est introuvable.
File name: 'UIAutomationProvider, Version=9.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'
   at Telerik.WinControls.UI.RadToggleSwitchElement.OnValueChanged()
   at Telerik.WinControls.UI.RadToggleSwitchElement.set_Value(Boolean value)
   at Telerik.WinControls.UI.RadToggleSwitchElement.InitializeFields()
   at Telerik.WinControls.RadElement..ctor()
   at Telerik.WinControls.VisualElement..ctor()
   at Telerik.WinControls.RadComponentElement..ctor()
   at Telerik.WinControls.RadItem..ctor()
   at Telerik.WinControls.UI.UIItemBase..ctor()
   at Telerik.WinControls.UI.LightVisualElement..ctor()
   at Telerik.WinControls.UI.RadToggleSwitchElement..ctor()
   at Telerik.WinControls.UI.RadRibbonBarElement.CreateButtons()
   at Telerik.WinControls.UI.RadRibbonBarElement.CreateChildElements()
   at Telerik.WinControls.RadElement.CallCreateChildElements()
   at Telerik.WinControls.RadElement.Construct()
   at Telerik.WinControls.RadElement..ctor()
   at Telerik.WinControls.VisualElement..ctor()
   at Telerik.WinControls.RadComponentElement..ctor()
   at Telerik.WinControls.RadItem..ctor()
   at Telerik.WinControls.UI.UIItemBase..ctor()
   at Telerik.WinControls.UI.LightVisualElement..ctor()
   at Telerik.WinControls.UI.RadRibbonBarElement..ctor()
   at Telerik.WinControls.UI.RadRibbonBar.CreateRibbonBarElement()
   at Telerik.WinControls.UI.RadRibbonBar.CreateChildItems(RadElement parent)
   at Telerik.WinControls.RadControl.Telerik.WinControls.IComponentTreeHandler.CreateChildItems(RadElement parent)
   at Telerik.WinControls.RadElementTree.InitializeRootElement()
   at Telerik.WinControls.RadControl.Construct()
   at Telerik.WinControls.RadControl..ctor()
   at Telerik.WinControls.RadNonClientUIControl..ctor()
   at Telerik.WinControls.UI.RadRibbonBar..ctor()
   at App.MainForm.InitializeComponent()
   at App.MainForm..ctor(IServiceProvider provider)
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor)
   at System.Reflection.MethodBaseInvoker.InvokeDirectByRefWithFewArgs(Object obj, Span`1 copyOfArgs, BindingFlags invokeAttr)
   at System.Reflection.MethodBaseInvoker.InvokeWithOneArg(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitDisposeCache(ServiceCallSite transientCallSite, RuntimeResolverContext context)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.DynamicServiceProviderEngine.<>c__DisplayClass2_0.<RealizeService>b__0(ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(ServiceIdentifier serviceIdentifier, ServiceProviderEngineScope serviceProviderEngineScope)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType)
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider)
   at App.Program.Main()

[Dinko | Tech Support Engineer]

Hello Camille,

Thank you for the provided stack trace.

To be honest, I am not sure why this error appears. In general, to use UI Automation in our source code build against Net 9, we have added the UseWpf tag in the project file. Can you try the same and share if the error appears again? For example, you can open the project file by double-clicking on the project name and adding the tag.

<Project Sdk="Microsoft.NET.Sdk">

	<PropertyGroup>
		<OutputType>WinExe</OutputType>
		<TargetFramework>net9.0-windows</TargetFramework>
		<Nullable>enable</Nullable>
		<UseWindowsForms>true</UseWindowsForms>
		<UseWpf>true</UseWpf>
		<ImplicitUsings>enable</ImplicitUsings>
	</PropertyGroup>

</Project>

Regards,
Dinko | Tech Support Engineer
Progress Telerik

[Camille]

Hi Dinko,

Thank you for your answer. Adding this tag does the trick when deploying (even it's a bit annoying to add WPF references to a Winforms application).

Consider this solved.

Regards