How to add extra field when serializing JSON?

Question

JSON

When serializing an object of any type, if the property of this object has a specific name, then you need to add an additional field and set its value.
Example:

class MyClass
{
    public object Item;
}

You should get the following json

{
    "Item" : {},
    "Item_Type" : "123"
}

It is also necessary to change the Item value during deserialization depending on the Item_Type, which is not described by the class and exists only in json.
Such objects can be nested, contained in arrays, and there are a lot of such types. Therefore, setting up a serialization attribute for each field is not the best option
. Newton JSON.net serializer is used

Answer 1

Most likely you need to use a custom class from JsonConverter with an overridden WriteJson method