InitializeComponent() Cannot locate resource based on system language

Question

The application was developed on machines running windows 10, with the system language set to our local language, danish. Now we are at a stage where the software needs to be used in offices in other countries. However, the view crashes on startup on those machines, and I have found out that if I change the system language on my own machine, it will not work for me either. Why this is, we can't figure out.

Error message from InitializeComponent:

System.IO.IOException: 'Cannot locate resource 'views/main/mainview.xaml'.'

StackTrace:

at MS.Internal.AppModel.ResourcePart.GetStreamCore(FileMode mode, FileAccess access) at System.IO.Packaging.PackagePart.GetStream(FileMode mode, FileAccess access) at System.IO.Packaging.PackagePart.GetStream() at System.Windows.Application.LoadComponent(Object component, Uri resourceLocator) at InfoCenter.Views.Main.MainView.InitializeComponent() in D:\Workspace\Visual Studio\MT Info Center WPF\Info Center\Views\Main\MainView.xaml:line 1 at InfoCenter.Views.Main.MainView..ctor() in D:\Workspace\Visual Studio\MT Info Center WPF\Info Center\Views\Main\MainView.xaml.cs:line 21 at InfoCenter.App.OnStartup(StartupEventArgs e) in D:\Workspace\Visual Studio\MT Info Center WPF\Info Center\App.xaml.cs:line 57 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 System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) 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.Application.RunDispatcher(Object ignore) at System.Windows.Application.RunInternal(Window window) at System.Windows.Application.Run(Window window) at System.Windows.Application.Run() at InfoCenter.App.Main() in D:\Workspace\Visual Studio\MT Info Center WPF\Info Center\obj\Debug\App.g.cs:line 51

Here is some of the code:

App.xaml

<!--ANCHOR: Updater-->
<updater:SingleInstanceApplication x:Class="InfoCenter.App"
                                   x:Name="App"
                                   xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                                   xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                                   xmlns:updater="clr-namespace:InfoCenter.Updater">
    <Application.Resources>
    </Application.Resources>
</updater:SingleInstanceApplication>

App.xaml.cs:

protected override void OnStartup(StartupEventArgs e)
{
    if (PreProcessor.Prod)
        Dispatcher.UnhandledException += OnDispatcherUnhandledException;

    base.OnStartup(e);

    AppDomain.CurrentDomain.SetPrincipalPolicy(PrincipalPolicy.WindowsPrincipal);

    var app = new MainView { ShowInTaskbar = false, Topmost = true }
    var context = new MainViewModel();
    app.DataContext = context;
    app.Show();
}

Other info: - We deploy using ClickOnce. - The app have some background tasks that will keep running. It look like it just runs without a view. - We use MVVM pattern.

If I am missing some information, don't hesitate to ask!

Answer 1

It was a problem regarding the Culture Info, since you have added this line in your resource file

<UICulture>en-US</UICulture> 

Following this post you should be able to solve your problem uncommenting this line

[assembly: NeutralResourcesLanguage("en-US", UltimateResourceFallbackLocation.Satellite)] 

in your assembly.info.cs