It cannot serialize the F# version of a struct with Newtonsoft.Json.
The weird thing is that I can do it using C#.
Steps to reproduce:
- restore and build the solution
- run the unit tests
The serialize F# struct test should fail:
Failed serialize F# struct [9 ms]
Error Message:
System.IO.FileNotFoundException : Could not load file or assembly '"The system type 'System.Runtime.CompilerServices.IsReadOnlyAttribute' was required but no referenced system DLL contained this type", Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'. The system cannot find the file specified.
Stack Trace:
at System.ModuleHandle.ResolveType(QCallModule module, Int32 typeToken, IntPtr* typeInstArgs, Int32 typeInstCount, IntPtr* methodInstArgs, Int32 methodInstCount, ObjectHandleOnStack type)
at System.ModuleHandle.ResolveTypeHandle(Int32 typeToken, RuntimeTypeHandle[] typeInstantiationContext, RuntimeTypeHandle[] methodInstantiationContext)
at System.Reflection.RuntimeModule.ResolveType(Int32 metadataToken, Type[] genericTypeArguments, Type[] genericMethodArguments)
at System.Reflection.CustomAttribute.FilterCustomAttributeRecord(MetadataToken caCtorToken, MetadataImport& scope, RuntimeModule decoratedModule, MetadataToken decoratedToken, RuntimeType attributeFilterType, Boolean mustBeInheritable, ListBuilder`1& derivedAttributes, RuntimeType& attributeType, IRuntim
eMethodInfo& ctorWithParameters, Boolean& isVarArg)
at System.Reflection.CustomAttribute.IsCustomAttributeDefined(RuntimeModule decoratedModule, Int32 decoratedMetadataToken, RuntimeType attributeFilterType, Int32 attributeCtorToken, Boolean mustBeInheritable)
at System.Reflection.CustomAttribute.IsDefined(RuntimeMethodInfo method, RuntimeType caType, Boolean inherit)
at System.Reflection.RuntimeMethodInfo.IsDefined(Type attributeType, Boolean inherit)
at Newtonsoft.Json.Serialization.DefaultContractResolver.IsValidCallback(MethodInfo method, ParameterInfo[] parameters, Type attributeType, MethodInfo currentCallback, Type& prevAttributeType)
at Newtonsoft.Json.Serialization.DefaultContractResolver.GetCallbackMethodsForType(Type type, List`1& onSerializing, List`1& onSerialized, List`1& onDeserializing, List`1& onDeserialized, List`1& onError)
at Newtonsoft.Json.Serialization.DefaultContractResolver.ResolveCallbackMethods(JsonContract contract, Type t)
at Newtonsoft.Json.Serialization.DefaultContractResolver.InitializeContract(JsonContract contract)
at Newtonsoft.Json.Serialization.DefaultContractResolver.CreateObjectContract(Type objectType)
at Newtonsoft.Json.Serialization.DefaultContractResolver.CreateContract(Type objectType)
at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory)
at Newtonsoft.Json.Utilities.ThreadSafeStore`2.Get(TKey key)
at Newtonsoft.Json.Serialization.DefaultContractResolver.ResolveContract(Type type)
at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.GetContract(Object value)
at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.GetContractSafe(Object value)
at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize(JsonWriter jsonWriter, Object value, Type objectType)
at Newtonsoft.Json.JsonSerializer.SerializeInternal(JsonWriter jsonWriter, Object value, Type objectType)
at Newtonsoft.Json.JsonSerializer.Serialize(JsonWriter jsonWriter, Object value, Type objectType)
at Newtonsoft.Json.JsonConvert.SerializeObjectInternal(Object value, Type type, JsonSerializer jsonSerializer)
at Newtonsoft.Json.JsonConvert.SerializeObject(Object value, Type type, JsonSerializerSettings settings)
at Newtonsoft.Json.JsonConvert.SerializeObject(Object value)
If you change the SDK version in the global.json to 6.0.400 both tests will pass.