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Nullable fields from schema are not reflected in generated C#

See original GitHub issue

Hello

I’m using dotnet avro generate to create C# class from Avro schema.

My schema looks like

{
  "name": "Models.MyClass",
  "type": "record",
  "fields": [
    {"name": "BoolField", "type": ["null", "boolean"]},
    {"name": "StringField", "type": ["null", "string"]},
    {
      "name": "RecordField",
      "type": ["null", {
        "name": "Models.Credentials",
        "type": "record",
        "fields": [
          {"name": "Password", "type": "string"},
          {"name": "Username", "type": "string"}
        ]
      }]
    }, {
      "name": "EnumField",
      "type": ["null", {
        "name": "Models.AccountStatus",
        "type": "enum",
        "symbols": ["New", "Active"]
      }]
    }
  ]
}

I expect that properties BoolField, StringField, RecordField, EnumField will be nullable in generated class. But they are not. The resulting C# class looks like

namespace Models
{
    public enum AccountStatus
    {
        New,
        Active
    }

    public class Credentials
    {
        public string Password { get; set; }
        public string Username { get; set; }
    }

    public class MyClass
    {
        public bool? BoolField { get; set; }
        public string StringField { get; set; }
        public Credentials RecordField { get; set; }
        public AccountStatus EnumField { get; set; }
    }
}

Am I missing smth or this is a bug in code generation ?