JSON.NET Custom Serialization With Single Element Array

Question

I have a schema definition like that:

{
  "value": number | number[]
}

So I define a C# model like:

class Example
{
    public int[] Value { get; set; }
}

So I want a custom serializer that can be simplify a single element array and deserialize a single value to C# array.

Excepted test case:

var model = new Example { Value = new [] { 1 } };
var json = myCustomSerializer.Serialize(model);
Assert.Equal(json, "{\"value\":1}");

var json = "{\"value\":1}";
var model = myCustomSerializer.Deserialize<Example>(json);
Assert.SequenceEqual(model.Value, new [] { 1 });

var model = new Example { Value = new [] { 1, 2, 3 } };
var json = myCustomSerializer.Serialize(model);
Assert.Equal(json, "{\"value\":[1,2,3]}");

var json = "{\"value\":[1,2,3]}";
var model = myCustomSerializer.Deserialize<Example>(json);
Assert.SequenceEqual(model.Value, new [] { 1, 2, 3 });