System.Text.Json deserialization issue

[jcmag]

Hi,

I'm trying the latest nuget package, and with each Send* method I get a deserialization issue ("generic types are not valid") :

System.NotSupportedException: Generic types are not valid. at System.Reflection.CustomAttribute._CreateCaObject(RuntimeModule pModule, IRuntimeMethodInfo pCtor, Byte* ppBlob, Byte pEndBlob, Int32* pcNamedArgs) at System.Reflection.CustomAttribute.CreateCaObject(RuntimeModule module, IRuntimeMethodInfo ctor, IntPtr& blob, IntPtr blobEnd, Int32& namedArgs) at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeModule decoratedModule, Int32 decoratedMetadataToken, Int32 pcaCount, RuntimeType attributeFilterType, Boolean mustBeInheritable, IList derivedAttributes, Boolean isDecoratedTargetSecurityTransparent) at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeType type, RuntimeType caType, Boolean inherit) at System.Attribute.GetCustomAttributes(MemberInfo element, Type type, Boolean inherit) at System.Reflection.CustomAttributeExtensions.GetCustomAttributes[T](MemberInfo element) at Telegram.Bot.Serialization.PolymorphicJsonConverterFactory.CanConvert(Type typeToConvert) at System.Text.Json.JsonSerializerOptions.GetConverterFromList(Type typeToConvert) at System.Text.Json.Serialization.Metadata.DefaultJsonTypeInfoResolver.GetConverterForType(Type typeToConvert, JsonSerializerOptions options, Boolean resolveJsonConverterAttribute) at System.Text.Json.Serialization.Metadata.DefaultJsonTypeInfoResolver.GetTypeInfo(Type type, JsonSerializerOptions options) at System.Text.Json.JsonSerializerOptions.GetTypeInfoNoCaching(Type type) at System.Text.Json.JsonSerializerOptions.CachingContext.CreateCacheEntry(Type type, CachingContext context) --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Text.Json.JsonSerializerOptions.CachingContext.CacheEntry.GetResult() at System.Text.Json.JsonSerializerOptions.GetTypeInfoInternal(Type type, Boolean ensureConfigured, Nullable1 ensureNotNull, Boolean resolveIfMutable, Boolean fallBackToNearestAncestorType) at System.Text.Json.Serialization.Metadata.JsonTypeInfo.Configure() at System.Text.Json.Serialization.Metadata.JsonTypeInfo.<EnsureConfigured>g__ConfigureSynchronized|172_0() at System.Text.Json.JsonSerializerOptions.GetTypeInfoInternal(Type type, Boolean ensureConfigured, Nullable1 ensureNotNull, Boolean resolveIfMutable, Boolean fallBackToNearestAncestorType) at System.Text.Json.Serialization.Metadata.JsonPropertyInfo.Configure() at System.Text.Json.Serialization.Metadata.JsonTypeInfo.ConfigureProperties() at System.Text.Json.Serialization.Metadata.JsonTypeInfo.Configure() at System.Text.Json.Serialization.Metadata.JsonTypeInfo.gConfigureSynchronized|172_0() at System.Text.Json.JsonSerializerOptions.GetTypeInfoInternal(Type type, Boolean ensureConfigured, Nullable1 ensureNotNull, Boolean resolveIfMutable, Boolean fallBackToNearestAncestorType) at System.Text.Json.Serialization.Metadata.JsonPropertyInfo.Configure() at System.Text.Json.Serialization.Metadata.JsonTypeInfo.ConfigureProperties() at System.Text.Json.Serialization.Metadata.JsonTypeInfo.Configure() at System.Text.Json.Serialization.Metadata.JsonTypeInfo.<EnsureConfigured>g__ConfigureSynchronized|172_0() at System.Text.Json.JsonSerializerOptions.GetTypeInfoInternal(Type type, Boolean ensureConfigured, Nullable1 ensureNotNull, Boolean resolveIfMutable, Boolean fallBackToNearestAncestorType) at System.Text.Json.Serialization.Metadata.JsonPropertyInfo.Configure() at System.Text.Json.Serialization.Metadata.JsonTypeInfo.ConfigureProperties() at System.Text.Json.Serialization.Metadata.JsonTypeInfo.Configure() at System.Text.Json.Serialization.Metadata.JsonTypeInfo.gConfigureSynchronized|172_0() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Text.Json.Serialization.Metadata.JsonTypeInfo.g__ConfigureSynchronized|172_0() at System.Text.Json.JsonSerializerOptions.GetTypeInfoInternal(Type type, Boolean ensureConfigured, Nullable1 ensureNotNull, Boolean resolveIfMutable, Boolean fallBackToNearestAncestorType) at System.Text.Json.JsonSerializerOptions.GetTypeInfoForRootType(Type type, Boolean fallBackToNearestAncestorType) at System.Text.Json.JsonSerializer.GetTypeInfo[T](JsonSerializerOptions options) at System.Text.Json.JsonSerializer.DeserializeAsync[TValue](Stream utf8Json, JsonSerializerOptions options, CancellationToken cancellationToken) at Telegram.Bot.Extensions.HttpResponseMessageExtensions.<DeserializeContentAsync>d__01.MoveNext()

I'm using System.Text.Json v8.0.3, Telegram.Bot v20.0.0-alpha.6.stj My project is a .NET v4.8.1 web site

[jcmag]

I don't have the problem with Telegram.Bot v20.0.0-alpha.4 The issue starts with v20.0.0-alpha.4.stj

[tuscen]

Could you show the stack trace in English, please?

[jcmag]

Could you show the stack trace in English, please?

done (I've edited my first message)

[tuscen]

@jcmag Try using 20.0.0-alpha.7.stj, it should be fixed there. It was the usage of generic attributes which aren't supported on legacy runtimes.

[jcmag]

it's working now, thanks for the quick fix!