How to detect Lists in Json.Net Serialization

Say I have two classes: A and B

public class A
{
    public string Name { get; set; }

    public List<int> IntList { get; set; }

    public List<B> BList { get; set; }
}

public class B
{
    public string Id { get; set; }
}

And I want to shallowly* serialize them using a Json.Net ContractResolver. *By shallow I mean, only value types and lists of value types so the json of a serialized class A would contain both Name and IntList but not BList.

So here Is what I have so far (adapted from this question):

public class ShallowResolver : DefaultContractResolver
    {
        protected override JsonProperty CreateProperty(MemberInfo member, MemberSerialization memberSerialization)
        {
            JsonProperty prop = base.CreateProperty(member, memberSerialization);

            if (prop.PropertyType.IsClass)
            {
                prop.ShouldSerialize = obj => false;
            }

            return prop;
        }
    }

This resolver handles the case of references, however it does nothing to address my list requirement. I was unable to find something like prop.PropertyType.IsList and prop.PropertyType.IsArray didn't seem to do the trick either.

Is there a way to, inside of my ShallowResolver, identify if a property is a list? and if so, is there a way to identify if the list is of primitive types?