{"record":{"id":"6387ff932d1afd7d","repo":"dotnet/wpf","slug":"sr-serializerprovidermanufacturerwebsitenull","errorCode":null,"errorMessage":"SR.SerializerProviderManufacturerWebsiteNull","messagePattern":"SR\\.SerializerProviderManufacturerWebsiteNull","errorType":"exception","errorClass":"ArgumentException","httpStatus":null,"severity":"error","filePath":"src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Documents/Serialization/SerializerDescriptor.cs","lineNumber":74,"sourceCode":"        ///     This method currently requires full trust to run.\n        /// </remarks>\n        public static SerializerDescriptor CreateFromFactoryInstance(\n            ISerializerFactory  factoryInstance\n            )\n        {\n\n            ArgumentNullException.ThrowIfNull(factoryInstance);\n            if (factoryInstance.DisplayName == null)\n            {\n                throw new ArgumentException(SR.SerializerProviderDisplayNameNull);\n            }\n            if (factoryInstance.ManufacturerName == null)\n            {\n                throw new ArgumentException(SR.SerializerProviderManufacturerNameNull);\n            }\n            if (factoryInstance.ManufacturerWebsite == null)\n            {\n                throw new ArgumentException(SR.SerializerProviderManufacturerWebsiteNull);\n            }\n            if (factoryInstance.DefaultFileExtension == null)\n            {\n                throw new ArgumentException(SR.SerializerProviderDefaultFileExtensionNull);\n            }\n\n            SerializerDescriptor sd = new SerializerDescriptor\n            {\n                _displayName = factoryInstance.DisplayName,\n                _manufacturerName = factoryInstance.ManufacturerName,\n                _manufacturerWebsite = factoryInstance.ManufacturerWebsite,\n                _defaultFileExtension = factoryInstance.DefaultFileExtension,\n\n                // When this is called with an instantiated factory object, it must be loadable\n                _isLoadable = true\n            };\n\n            Type factoryType = factoryInstance.GetType();","sourceCodeStart":56,"sourceCodeEnd":92,"githubUrl":"https://github.com/dotnet/wpf/blob/81131a70a4c573cd62748a5c36908fc4d662daa9/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Documents/Serialization/SerializerDescriptor.cs#L56-L92","documentation":"SerializerDescriptor.CreateFromFactoryInstance throws ArgumentException (SR.SerializerProviderManufacturerWebsiteNull) when the ISerializerFactory's ManufacturerWebsite property is null. The website is mandatory metadata describing where users can obtain the serializer plugin.","triggerScenarios":"Calling CreateFromFactoryInstance or RegisterSerializer with a factory whose ManufacturerWebsite property returns null.","commonSituations":"Custom serializer factories omitting the website property; template/scaffold code leaving the getter unimplemented.","solutions":["Return a valid non-null website URL string from ManufacturerWebsite","Validate all factory properties (DisplayName, ManufacturerName, ManufacturerWebsite, DefaultFileExtension) before registration","Catch ArgumentException around RegisterSerializer when accepting third-party factories"],"exampleFix":"// before\npublic string ManufacturerWebsite => null;\n// after\npublic string ManufacturerWebsite => \"https://example.com/myserializer\";","handlingStrategy":"validation","validationCode":"if (string.IsNullOrEmpty(factory.ManufacturerWebsite))\n    throw new InvalidOperationException(\"Serializer ManufacturerWebsite must be set before registration\");","typeGuard":"bool HasWebsite(ISerializerFactory f) => !string.IsNullOrEmpty(f.ManufacturerWebsite);","tryCatchPattern":"try { SerializerProvider.RegisterSerializer(descriptor); }\ncatch (ArgumentException) { /* supply missing metadata and retry */ }","preventionTips":["Return a valid absolute URL from ManufacturerWebsite","Add factory metadata validation to CI tests"],"tags":["wpf","serializer","null-argument","argumentexception"],"backgroundTag":"null-argument","analyzedSha":"81131a70a4c573cd62748a5c36908fc4d662daa9","analyzedAt":"2026-09-14T10:12:48.479Z","contentChangedAt":"2026-09-14T10:12:48.479Z","schemaVersion":2},"datasetVersion":"2026-09-21T21:30:21.729Z"}