Serializing a KeyValuePair in DCS doesn't work in a trimmed app #52083
Description
See the test failing here.
fail: [FAIL] DataContractJsonSerializerTests.DCJS_KeyValuePair
info: System.NullReferenceException : Object reference not set to an instance of an object.
info: at System.Runtime.Serialization.ReflectionClassWriter.ResolveAdapterType(Object obj, ClassDataContract classContract)
info: at System.Runtime.Serialization.ReflectionClassWriter.ReflectionWriteClass(XmlWriterDelegator xmlWriter, Object obj, XmlObjectSerializerWriteContext context, ClassDataContract classContract, XmlDictionaryString[] memberNames)
info: at System.Runtime.Serialization.Json.ReflectionJsonFormatWriter.ReflectionWriteClass(XmlWriterDelegator xmlWriter, Object obj, XmlObjectSerializerWriteContextComplexJson context, ClassDataContract classContract, XmlDictionaryString[] memberNames)
info: at System.Runtime.Serialization.Json.JsonClassDataContract.WriteJsonValueCore(XmlWriterDelegator jsonWriter, Object obj, XmlObjectSerializerWriteContextComplexJson context, RuntimeTypeHandle declaredTypeHandle)
info: at System.Runtime.Serialization.Json.JsonDataContract.WriteJsonValue(XmlWriterDelegator jsonWriter, Object obj, XmlObjectSerializerWriteContextComplexJson context, RuntimeTypeHandle declaredTypeHandle)
info: at System.Runtime.Serialization.Json.DataContractJsonSerializerImpl.WriteJsonValue(JsonDataContract contract, XmlWriterDelegator writer, Object graph, XmlObjectSerializerWriteContextComplexJson context, RuntimeTypeHandle declaredTypeHandle)
info: at System.Runtime.Serialization.Json.XmlObjectSerializerWriteContextComplexJson.WriteDataContractValue(DataContract dataContract, XmlWriterDelegator xmlWriter, Object obj, RuntimeTypeHandle declaredTypeHandle)
info: at System.Runtime.Serialization.XmlObjectSerializerWriteContext.SerializeAndVerifyType(DataContract dataContract, XmlWriterDelegator xmlWriter, Object obj, Boolean verifyKnownType, RuntimeTypeHandle declaredTypeHandle, Type declaredType)
info: at System.Runtime.Serialization.Json.XmlObjectSerializerWriteContextComplexJson.SerializeWithXsiTypeAtTopLevel(DataContract dataContract, XmlWriterDelegator xmlWriter, Object obj, RuntimeTypeHandle originalDeclaredTypeHandle, Type graphType)
info: at System.Runtime.Serialization.Json.DataContractJsonSerializerImpl.InternalWriteObjectContent(XmlWriterDelegator writer, Object graph)
info: at System.Runtime.Serialization.Json.DataContractJsonSerializerImpl.InternalWriteObject(XmlWriterDelegator writer, Object graph)
info: at System.Runtime.Serialization.XmlObjectSerializer.InternalWriteObject(XmlWriterDelegator writer, Object graph, DataContractResolver dataContractResolver)
info: at System.Runtime.Serialization.XmlObjectSerializer.WriteObjectHandleExceptions(XmlWriterDelegator writer, Object graph, DataContractResolver dataContractResolver)
info: at System.Runtime.Serialization.XmlObjectSerializer.WriteObjectHandleExceptions(XmlWriterDelegator writer, Object graph)
info: at System.Runtime.Serialization.Json.DataContractJsonSerializerImpl.WriteObject(XmlDictionaryWriter writer, Object graph)
info: at System.Runtime.Serialization.Json.DataContractJsonSerializerImpl.WriteObject(Stream stream, Object graph)
info: at System.Runtime.Serialization.Json.DataContractJsonSerializer.WriteObject(Stream stream, Object graph)
info: at DataContractJsonSerializerTests.SerializeAndDeserialize[KeyValuePair`2](KeyValuePair`2 value, String baseline, DataContractJsonSerializerSettings settings, Func`1 serializerFactory, Boolean skipStringCompare)
info: at DataContractJsonSerializerTests.DCJS_KeyValuePair()
info: at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
The issue is this code:
We need to annotate this so the linker will preserve the ctor on this class:
cc @joperezr