Use System.Text.Json in generated C# models (DTOs)

[RicoSuter]

Tasks:

• Add new setting, e.g. Serializer with enums NewtonsoftJson | SystemTextJson

Used Newtonsoft.Json features (need replacements):

• Newtonsoft.Json.JsonConvert.DeserializeObject
• Newtonsoft.Json.JsonConvert.SerializeObject
• [Newtonsoft.Json.JsonConstructor] (records)
• [Newtonsoft.Json.JsonConverter(typeof(JsonInheritanceConverter), "{{ Discriminator }}")]
• [Newtonsoft.Json.JsonObjectAttribute] (exception serialization)
• [Newtonsoft.Json.JsonProperty]
  • With optional string enum converter
  • JsonPropertyNameAttribute (property name only)
• [Newtonsoft.Json.JsonConverter(typeof(Newtonsoft.Json.Converters.StringEnumConverter))]
• [Newtonsoft.Json.JsonConverter(typeof(DateFormatConverter))] (custom date converter, iso date)
  • https://github.com/dotnet/corefx/issues/36639
• [Newtonsoft.Json.JsonExtensionData]
  • https://github.com/dotnet/corefx/issues/37558
  • https://github.com/dotnet/corefx/blob/master/src/System.Text.Json/src/System/Text/Json/Serialization/JsonExtensionDataAttribute.cs

[RicoSuter]

Ref https://github.com/RicoSuter/NJsonSchema/pull/1333 https://github.com/RicoSuter/NJsonSchema/pull/1331

[xperiandri]

That would be super helpful

[RicoSuter]

See https://github.com/RicoSuter/NSwag/issues/2243#issuecomment-780438323