stride3d/stride · error · InvalidOperationException

No service matches the given type.

Error message

No service matches the given type.

What it means

NullServiceProvider is a deliberately inert IServiceProvider whose Get methods always throw. It is used as a placeholder service provider (e.g. for view models with no services) so any service lookup on it is by definition a bug.

Solutions

1. Do not look up services from NullServiceProvider; inject a real ViewModelServiceProvider instead
2. Check where the view model got its ServiceProvider and ensure the real provider is passed in before services are consumed
3. If NullServiceProvider is intentionally used, remove the Get call or null-check the provider before resolving

Example fix

// before
var dialogService = viewModel.ServiceProvider.Get<IDialogService>();
// after
if (viewModel.ServiceProvider is NullServiceProvider) throw new InvalidOperationException("ViewModel has no service provider");
var dialogService = viewModel.ServiceProvider.Get<IDialogService>();

if (serviceProvider is Stride.Core.Presentation.ViewModels.NullServiceProvider)
    throw new InvalidOperationException("No real service provider configured for this view model");

bool HasRealProvider(IServiceProvider p) => p is not NullServiceProvider;

try { svc = provider.Get(typeof(IMyService)); }
catch (InvalidOperationException ex) { log.Warn(ex, "Service lookup on null provider"); svc = null; }

When it happens

Trigger: Calling NullServiceProvider.Get(Type) or Get<T>() — any lookup at all, since the provider never resolves anything.

Common situations: A view model was constructed with or defaulted to NullServiceProvider and application code (or a template/property binding) asks it for a service such as a dialog service or logger.

Understand the failure class

Background: 'Could not be found', 'does not exist', 'not found in database': the resource-not-found family when an ID, slug, key, or URI lookup comes back empty — this error's family across 20 libraries.

Related errors

• The given IViewModelServiceProvider instance does not…
• A service of the same type has already been registered.
• Multiple services match the given type.
• No service matches the given type.
• The provided path is not a valid path name.

AI-assisted analysis of stride3d/stride@96fad776d2 (2026-09-14). Data as JSON: /api/errors/0ea5067370452da1. Report an issue: GitHub.

Appendix: source

Thrown at sources/presentation/Stride.Core.Presentation/ViewModels/NullServiceProvider.cs:48

        throw new InvalidOperationException("Cannot unregister a service on a NullServiceProvider.");
    }

    /// <inheritdoc/>
    public object? TryGet(Type serviceType)
    {
        return null;
    }

    /// <inheritdoc/>
    public T? TryGet<T>() where T : class
    {
        return null;
    }

    /// <inheritdoc/>
    public object Get(Type serviceType)
    {
        throw new InvalidOperationException("No service matches the given type.");
    }

    /// <inheritdoc/>
    public T Get<T>() where T : class
    {
        throw new InvalidOperationException("No service matches the given type.");
    }
}

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