如何使用DateTime属性从Json（通过Python）反序列化MessagePack？

Question

我正在尝试将从python客户端生成的MessagePack消息反序列化为.net对象。 DateTimes遇到了一些麻烦。有趣的是，停留在C＃领域也不起作用。

Newtonsoft能够正确反序列化json。尽管MessagePack的ToJson返回有效的Json，但反序列化对象失败。

[DataContract]
public class TestClass
{
    [DataMember]
    public string TestPropertyA { get; set; }
    [DataMember]
    public string TestPropertyB { get; set; }
    [DataMember]

    public DateTime EventTimeStamp { get; set; }
}

        //Move from Json string to an object
        String jsonStringFromPython = "{\"TestPropertyA\":\"Hello\",\"TestPropertyB\":\"World\",\"EventTimeStamp\":\"2019-05-02T16:04:30.7812850Z\"}";
        TestClass anObject = JsonConvert.DeserializeObject<TestClass>(jsonStringFromPython);

        //Generate byte arrays for Messagepack
        Byte[] arrFromAString = MessagePackSerializer.FromJson(jsonStringFromPython);
        Byte[] arrFromAnObj = MessagePackSerializer.Serialize<TestClass>(anObject);
        CompositeResolver.RegisterAndSetAsDefault(PrimitiveObjectResolver.Instance, ContractlessStandardResolver.Instance);

        //Message pack understands the object-generated byte array
        var backtoobject = MessagePackSerializer.Deserialize<TestClass>(arrFromAnObj);

        //Message pack DOES NOT UNDERSTAND the string-generated byte array and fails with code is invalid. code:188 format:fixstr'
        var backtoobject2 = MessagePackSerializer.Deserialize<TestClass>(arrFromAString);

上面的代码的最后一行失败，但是如果我从字符串/对象中删除DateTime属性，则所有代码都可以正常工作。