{"record":{"id":"b6c93868aa401bb3","repo":"stride3d/stride","slug":"the-property-name-of-type-declaringtype-name-has-no-setter","errorCode":null,"errorMessage":"The property [{Name}] of type [{DeclaringType.Name}] has no setter.","messagePattern":"The property \\[(.+?)\\] of type \\[(.+?)\\] has no setter\\.","errorType":"exception","errorClass":"InvalidOperationException","httpStatus":null,"severity":"error","filePath":"sources/core/Stride.Core.Reflection/MemberDescriptors/PropertyDescriptor.cs","lineNumber":49,"sourceCode":"    /// </summary>\n    /// <value>The property information.</value>\n    public PropertyInfo PropertyInfo { get; }\n\n    public override Type Type => PropertyInfo.PropertyType;\n\n    public sealed override bool IsPublic => getMethod?.IsPublic ?? false;\n\n    public override bool HasSet => setMethod != null;\n\n    public override object? Get(object? thisObject)\n    {\n        return getMethod?.Invoke(thisObject, null);\n    }\n\n    public override void Set(object? thisObject, object? value)\n    {\n        if (setMethod is null)\n            throw new InvalidOperationException($\"The property [{Name}] of type [{DeclaringType.Name}] has no setter.\");\n\n        setMethod.Invoke(thisObject, [value]);\n    }\n\n    public override IEnumerable<T> GetCustomAttributes<T>(bool inherit)\n    {\n        return PropertyInfo.GetCustomAttributes<T>(inherit);\n    }\n\n    /// <summary>\n    /// Returns a <see cref=\"string\" /> that represents this instance.\n    /// </summary>\n    /// <returns>A <see cref=\"string\" /> that represents this instance.</returns>\n    public override string ToString()\n    {\n        return $\"Property [{Name}] from Type [{(PropertyInfo.DeclaringType != null ? PropertyInfo.DeclaringType.FullName : string.Empty)}]\";\n    }\n}","sourceCodeStart":31,"sourceCodeEnd":67,"githubUrl":"https://github.com/stride3d/stride/blob/96fad776d210c221682aac1ccdf4c79dc046fc38/sources/core/Stride.Core.Reflection/MemberDescriptors/PropertyDescriptor.cs#L31-L67","documentation":"PropertyDescriptor.Set invokes the property's setter via reflection. If the property is read-only (no setMethod), it throws InvalidOperationException naming the property and declaring type, because the value cannot be written.","triggerScenarios":"Calling Set on a get-only property descriptor; serializing/assigning into read-only properties via the property system; editor/data-binding code attempting to write an inferred read-only property.","commonSituations":"Game studio/property grid editing a computed or get-only property; reflection-based data loading that tries to restore values into read-only properties; auto-generated descriptors where the backing set method wasn't found.","solutions":["Check PropertyDescriptor.HasSetter (or the property has a public setter) before calling Set","Make the property writable (add a setter) if it is legitimately mutable","Route the write to the backing field or a method instead of the read-only property"],"exampleFix":"// before\npropDesc.Set(entity, newValue); // read-only property\n// after\nif (propDesc.HasSetter) propDesc.Set(entity, newValue);","handlingStrategy":"validation","validationCode":"if (!propDesc.HasSetter) throw new NotSupportedException($\"{propDesc.Name} is read-only\");","typeGuard":null,"tryCatchPattern":"try { propDesc.Set(obj, value); }\ncatch (InvalidOperationException) { /* property is read-only; write backing field or skip */ }","preventionTips":["Check HasSetter before Set","Only expose editable properties to editors/bindings","Provide setter or alternate write path for mutable data"],"tags":["csharp","reflection","property","read-only"],"backgroundTag":"unsupported-operation","analyzedSha":"96fad776d210c221682aac1ccdf4c79dc046fc38","analyzedAt":"2026-09-14T02:59:31.279Z","contentChangedAt":"2026-09-14T02:59:31.279Z","schemaVersion":2},"datasetVersion":"2026-09-15T23:17:13.987Z"}