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TimeSpan Mismatch between Schema(string) vs Serialization(object graph)

See original GitHub issue

Can’t seem to deserialize a class with TimeSpan from the swagger2csclient generated clients.

The error i get on the client is

Newtonsoft.Json.JsonSerializationException: Cannot deserialize the current JSON object (e.g. {"name":"value"}) into type 'System.TimeSpan' because the type requires a JSON primitive value (e.g. string, number, boolean, null) to deserialize correctly.
To fix this error either change the JSON to a JSON primitive value (e.g. string, number, boolean, null) or change the deserialized type so that it is a normal .NET type (e.g. not a primitive type like integer, not a collection type like an array or List<T>) that can be deserialized from a JSON object. JsonObjectAttribute can also be added to the type to force it to deserialize from a JSON object.
Path '[0].offlineTimeSpan.ticks', line 1, position 225.

Not sure if this is related, but I noticed the data returned during serialization doesn’t seem to match the schema (see image below)

I thought TimeSpan was supported… but I guess I have to add it?

how would one go about adding TimeSpan support to the RestAPI and Nswag the CSharp generated clients?

On the server / Rest side: Do i have to use this: https://github.com/RicoSuter/NJsonSchema/wiki/Type-Mappers Or do I use Netwonsoft settings?

       services.AddSwaggerDocument(x =>
            {
                x.FlattenInheritanceHierarchy = true;
                x.SchemaGenerator.Settings.TypeMappers.Add(???));
                x.ActualSerializerSettings.Converters.Add(???);
            });

On the client, I see there are options to expose the JsonSerializerSettings but the CreateSerializerSettings is not virtual.