Generated code does not compile for inheritance with System.Text.Json

[csehatt741]

When the OpenAPI 3.0 schema defines inheritance the generated code using System.Text.Json is full of compilation errors.

NSwag: 13.15.7

OpenAPI definition:

TypeBase:
      type: object
      required:
        - $type
      properties:
        $type:
          type: string
      discriminator:
        propertyName: $type
TypeA:
  allOf:
    - $ref: '#/components/schemas/TypeBase'
    - type: object
TypeB:
  allOf:
    - $ref: '#/components/schemas/TypeBase'
    - type: object

Command: dotnet nswag openapi2csclient /JsonLibrary:SystemTextJson

Generated model specifies JsonInheritanceConverter improperly, which leaves a compilation error:

[JsonInheritanceConverter(typeof(TypeBase), "$type")]
[JsonInheritanceAttribute("TypeA", typeof(TypeA))]
[JsonInheritanceAttribute("TypeB", typeof(TypeB))]
[System.CodeDom.Compiler.GeneratedCode("NJsonSchema", "13.15.7.0 (NJsonSchema v10.6.7.0 (Newtonsoft.Json v13.0.0.0))")]
public partial class TypeBase
{

    private System.Collections.Generic.IDictionary<string, object> _additionalProperties = new System.Collections.Generic.Dictionary<string, object>();

    [System.Text.Json.Serialization.JsonExtensionData]
    public System.Collections.Generic.IDictionary<string, object> AdditionalProperties
    {
        get { return _additionalProperties; }
        set { _additionalProperties = value; }
    }

}

[System.CodeDom.Compiler.GeneratedCode("NJsonSchema", "13.15.7.0 (NJsonSchema v10.6.7.0 (Newtonsoft.Json v13.0.0.0))")]
public partial class TypeA : TypeBase
{

}

[System.CodeDom.Compiler.GeneratedCode("NJsonSchema", "13.15.7.0 (NJsonSchema v10.6.7.0 (Newtonsoft.Json v13.0.0.0))")]
public partial class TypeB : TypeBase
{

}

Generated JsonInheritanceConverter still uses NewtonsoftJson, which leaves a lot of compilation errors: internal class JsonInheritanceConverter : Newtonsoft.Json.JsonConverter

Is there any issue with the OpenAPI definition or does the command require some more parameters?
Though, the generated code using NewtonsoftJson works as expected.

[RicoSuter]

Did you use latest NSwag version? I think this has been fixed recently...

[csehatt741]

I've just updated to 13.15.8

Same, nothing changed.

[RicoSuter]

v13.15.9 (soon)

[csehatt741]

After updating to v13.15.9, still there is one more compilation error remained: internal class JsonInheritanceConverterAttribute : JsonConverterAttribute

JsonConverterAttribute should be fully qualified -> System.Text.Json.Serialization.JsonConverterAttribute