Wpf: Net Core 3 Publish SingleExe and User Settings Does not work

[ghost]

On the released version of Net Core 3 found new issue with PublishSingleFile, it has to do with User Settings. I have attached a small project syncfusionwpfapp4.zip
SyncfusionWpfApp4.zip
that you can reproduce the issue. The issue. In the projects MainWindow.xaml.cs file you will find a remarked out public UserAppSettings mySettings = new UserAppSettings(); This if unremarked Initializes the the UserSettings class. Without this the project builds and works, it publishes and works even as a PublishShingleFile, but with this unremarked and the UserSettings class used it will return the following eventlog error. So how in Net Core 3 can you use user settings that can be changed in a WPF application. Again it works fine from the win-64 folder and only breaks in the PublishSingleFile mode if the UserSettings.cs is used. I search for answers but did not find one. This is a sample small project using the broken parts of the production xml editor that run under .Net 4.7.2. in an attempt to migrate to Net Core 3.
Note: It states System.dll is missing and that is not true for win-x64 folder but is true for the publish extracted folder after attempting to run SingleExe with User Settings Class enabled.

[Application: SyncfusionWpfApp4.exe
CoreCLR Version: 4.700.19.46205
.NET Core Version: 3.0.0
Description: The process was terminated due to an unhandled exception.
Exception Info: System.Windows.Markup.XamlParseException: The invocation of the constructor on type 'SyncfusionWpfApp4.MainWindow' that matches the specified binding constraints threw an exception.
---> System.Configuration.ConfigurationErrorsException: An error occurred creating the configuration section handler for applicationSettings/SyncfusionWpfApp4.Properties.Settings: Could not load file or assembly 'System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'. The system cannot find the file specified. (C:\Users\DANNY~1.MCN\AppData\Local\Temp.net\SyncfusionWpfApp4\aegml1hv.syu\SyncfusionWpfApp4.dll.config line 8)
---> System.IO.FileNotFoundException: Could not load file or assembly 'System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'. The system cannot find the file specified.
File name: 'System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'
at System.Configuration.TypeUtil.GetType(IInternalConfigHost host, String typeString, Boolean throwOnError)
at System.Configuration.RuntimeConfigurationRecord.RuntimeConfigurationFactory.Init(RuntimeConfigurationRecord configRecord, FactoryRecord factoryRecord)
at System.Configuration.RuntimeConfigurationRecord.CreateSectionFactory(FactoryRecord factoryRecord)
at System.Configuration.BaseConfigurationRecord.FindAndEnsureFactoryRecord(String configKey, Boolean& isRootDeclaredHere)
--- End of inner exception stack trace ---
at System.Configuration.BaseConfigurationRecord.FindAndEnsureFactoryRecord(String configKey, Boolean& isRootDeclaredHere)
at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object& result, Object& resultRuntimeObject)
at System.Configuration.BaseConfigurationRecord.GetSection(String configKey)
at System.Configuration.ClientConfigurationSystem.System.Configuration.Internal.IInternalConfigSystem.GetSection(String sectionName)
at System.Configuration.ConfigurationManager.GetSection(String sectionName)
at System.Configuration.ClientSettingsStore.ReadSettings(String sectionName, Boolean isUserScoped)
at System.Configuration.LocalFileSettingsProvider.GetPropertyValues(SettingsContext context, SettingsPropertyCollection properties)
at System.Configuration.SettingsBase.GetPropertiesFromProvider(SettingsProvider provider)
at System.Configuration.SettingsBase.GetPropertyValueByName(String propertyName)
at System.Configuration.SettingsBase.get_Item(String propertyName)
at System.Configuration.ApplicationSettingsBase.GetPropertyValue(String propertyName)
at System.Configuration.ApplicationSettingsBase.get_Item(String propertyName)
at SyncfusionWpfApp4.Properties.Settings.get_ToDecimalStringFormat()
at SyncfusionWpfApp4.UserAppSettings..ctor()
at SyncfusionWpfApp4.MainWindow..ctor()
--- End of inner exception stack trace ---
at System.Windows.Markup.XamlReader.RewrapException(Exception e, IXamlLineInfo lineInfo, Uri baseUri)
at System.Windows.Markup.WpfXamlLoader.Load(XamlReader xamlReader, IXamlObjectWriterFactory writerFactory, Boolean skipJournaledProperties, Object rootObject, XamlObjectWriterSettings settings, Uri baseUri)
at System.Windows.Markup.WpfXamlLoader.LoadBaml(XamlReader xamlReader, Boolean skipJournaledProperties, Object rootObject, XamlAccessLevel accessLevel, Uri baseUri)
at System.Windows.Markup.XamlReader.LoadBaml(Stream stream, ParserContext parserContext, Object parent, Boolean closeStream)
at System.Windows.Application.LoadBamlStreamWithSyncInfo(Stream stream, ParserContext pc)
at System.Windows.Application.LoadComponent(Uri resourceLocator, Boolean bSkipJournaledProperties)
at System.Windows.Application.DoStartup()
at System.Windows.Application.<.ctor>b__1_0(Object unused)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
at System.Windows.Threading.DispatcherOperation.InvokeImpl()
at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)
at MS.Internal.CulturePreservingExecutionContext.CallbackWrapper(Object obj)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
--- End of stack trace from previous location where exception was thrown ---
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at MS.Internal.CulturePreservingExecutionContext.Run(CulturePreservingExecutionContext executionContext, ContextCallback callback, Object state)
at System.Windows.Threading.DispatcherOperation.Invoke()
at System.Windows.Threading.Dispatcher.ProcessQueue()
at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
at System.Windows.Threading.Dispatcher.Run()
at System.Windows.Application.RunDispatcher(Object ignore)
at System.Windows.Application.RunInternal(Window window)
at System.Windows.Application.Run()
at SyncfusionWpfApp4.App.Main()](url)

Just updated to 16.3.3 this morning and still does not work:

Microsoft Visual Studio Enterprise 2019
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VisualStudio.16.Release/16.3.3+29403.142
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Version 4.8.03761

Installed Version: Enterprise

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[vatsan-madhavan]

Have you tried this without PublishTrimmed? If not, would you mind giving that a try?

[ghost]

Installing 16.3.4 now once done will try.

[ghost]

@vatsan-madhavan That works without PublishTrimmed. Of course the published file is a lot bigger. Is this plans to fix this?

[ghost]

Setting PublishTrimmed to false in my production migration test application also works.

[vatsan-madhavan]

Unfortunately, there may be nothing to be _fixed_.

Please see https://github.com/mono/linker/blob/master/src/ILLink.Tasks/README.md which describes some of the pitfalls of using PublishTrimmed with WPF (and ASP.NET Core). I think you might have to experiment with _reflection roots_ to get things working for your application.

[ghost]

@vatsan-madhavan Thanks based on you link. I added the following to my project file and it now works with the PublishTrimmed set to true.
TrimmerRootAssembly Include="System"

[vatsan-madhavan]

Good to hear @SFC-Sarge!

[ghost]

@vatsan-madhavan thanks, just so you know in my production migration I had to add more to get PublishedTrimmed to work:

TrimmerRootAssembly Include="System"
TrimmerRootAssembly Include="System.Collections"
TrimmerRootAssembly Include="System.Xml.Linq

[rladuca]

I think this is at least partly due to extension assemblies hiding the dependencies.

[ghost]

True. I have a System.Xml.Linq.Extensions class.

Sent from Mailhttps://go.microsoft.com/fwlink/?LinkId=550986 for Windows 10

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From: Rob LaDuca [e-mail]
Sent: Thursday, October 10, 2019 3:49:51 PM
To: dotnet/wpf [e-mail]
Cc: Danny McNaught [e-mail]; Mention [e-mail]
Subject: Re: [dotnet/wpf] Net Core 3 Publish SingleExe and User Settings Does not work (#2034)

I think this is at least partly due to extension assemblies hiding the dependencies.

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