Deserialize JSON to interface array with Newtonsoft Json.NET

Question

There are MANY questions and some very good answers about using Json.NET to deserialize to an interface instead of a concrete class. A quick search of Stack Overflow will turn up lots of related results. That said, I do not believe any of the questions specifically address the use case of an array of interfaces. So I do not believe this is a duplicate question - if I have missed a post, please link to it.

Given an interface like this:

public interface IFoo
{
    public string Bar { get; set; }
}

And 2 implementations like this:

public class Foo1 : IFoo
{
    public string Bar { get; set; }
    public bool Other1 { get; set; }
}

public class Foo2 : IFoo
{
    public string Bar { get; set; }
    public int Other2 { get; set; }
}

And finally a parent class:

public class Parent
{
    public IFoo[] Foos { get; set; }
}

I would expect that I should be able to deserialize a JSON payload like this:

{
    "Foos": [{
            "$type": "Foo1, MyLibrary",
            "Bar": "I am a Foo 1",
            "Other1": true
        }, {
            "$type": "Foo2, MyLibrary",
            "Bar": "I am a Foo 2",
            "Other2": 999
        }
    ]
}

using the following statement:

Parent parent = JsonConvert.DeserializeObject<Parent>(json, new JsonSerializerSettings { TypeNameHandling = TypeNameHandling.Auto })

The result I am seeing is not an exception being thrown, but simply that parent.Foos is null.

What am I missing?