JSON.NET ignores ISerializable on collection type object

Question

I have a wrapped list that looks like this: ``` [JsonObject(MemberSerialization.Fields)] public class OrderManager : IEnumerable, ISerializable { public OrderManager() { } private List orders = new List(); public void AddOrder(OrderInfo orderInfo) { // do the work of making an order object from an OrderInfo. // Add the new order object to the private list of orders // orders.Add(order); } public IEnumerator GetEnumerator() { return orders.GetEnumerator(); } System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() { return orders.GetEnumerator(); } public OrderManager(SerializationInfo info, StreamingContext context) { // do custom serialization work here (never gets hit) } public void GetObjectData(SerializationInfo info, StreamingContext context) { // do custom serialization work here (never gets hit) } } ``` I include a field instance in a customer class like this: ``` [JsonObject(MemberSerialization.Fields)] public class Customer { p…

Accepted Answer

This answer might be late but:

This is because it checks for inheritance of `IEnumerable` before checking for inheritance of `ISerializable` so it will use the Enumerable interface to pull objects out first.

You can override this behavior by implementing your own contract resolver inheriting from `DefaultContractResolver` with this override:

```
    protected override JsonContract CreateContract(Type objectType)
    {
        if (typeof(ISerializable).IsAssignableFrom(objectType))
            return CreateISerializableContract(objectType);

return base.CreateContract(objectType);
    }
```

Preferably with some better logic, but this at the root will cause objects that implement `ISerializable` and `IEnumerable` to use the ISerializable implementation first.

JSON.NET ignores ISerializable on collection type object

Solution

Problem