stride3d/stride · error · InvalidOperationException

The type does not have a public constructor matching the…

Error message

The type {type.Name} does not have a public constructor matching the expected signature: ({string.Join(", ", (IEnumerable<Type>)AssetPropertyNodeGraphConstructorSignature)})

What it means

Error "The type {type.Name} does not have a public constructor matching the expected signature: ({string.Join(", ", (IEnumerable<Type>)AssetPropertyNodeGraphConstructorSignature)})" thrown in stride3d/stride.

Solutions

1. Add a public constructor to the graph type with signature (AssetPropertyGraphContainer, AssetItem, ILogger)
2. Fix the constructor parameter types so they match exactly
3. Regenerate/fix the assembly processor output if the attribute was applied to the wrong type

When it happens

Trigger: Thrown at sources/assets/Stride.Core.Assets.Quantum/AssetQuantumRegistry.cs:52 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of stride3d/stride@96fad776d2 (2026-09-14). Data as JSON: /api/errors/7584c3904aa9ebfd. Report an issue: GitHub.

Appendix: source

Thrown at sources/assets/Stride.Core.Assets.Quantum/AssetQuantumRegistry.cs:52

            return;

        // Read the precomputed scan index instead of reflecting over every type: the assembly processor
        // already buckets the [AssemblyScan] graph attributes, so this skips loading unrelated types (some
        // assemblies, e.g. Stride.Assets referencing MSBuild, can't fully load all their types in every host).
        var scanTypes = AssemblyRegistry.GetScanTypes(assembly);
        if (scanTypes is null)
            return;

        if (scanTypes.Types.TryGetValue(typeof(AssetPropertyGraphAttribute), out var graphTypes))
        {
            foreach (var type in graphTypes)
            {
                var attribute = type.GetCustomAttribute<AssetPropertyGraphAttribute>();
                if (attribute is null)
                    continue;

                if (type.GetConstructor(AssetPropertyNodeGraphConstructorSignature) is null)
                    throw new InvalidOperationException($"The type {type.Name} does not have a public constructor matching the expected signature: ({string.Join(", ", (IEnumerable<Type>)AssetPropertyNodeGraphConstructorSignature)})");

                if (!NodeGraphTypes.TryAdd(attribute.AssetType, type))
                    throw new ArgumentException($"The type {attribute.AssetType.Name} already has an associated property node graph type.");
            }
        }

        if (scanTypes.Types.TryGetValue(typeof(AssetPropertyGraphDefinitionAttribute), out var definitionTypes))
        {
            foreach (var type in definitionTypes)
            {
                var attribute = type.GetCustomAttribute<AssetPropertyGraphDefinitionAttribute>();
                if (attribute is null)
                    continue;

                if (type.GetConstructor(Type.EmptyTypes) is null)
                    throw new InvalidOperationException($"The type {type.Name} does not have a public parameterless constructor.)");

                if (NodeGraphDefinitions.ContainsKey(attribute.AssetType))

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