您的JSON实体是一个数组，而不是单个对象.这就是为什么JSON.NET要求您进行反序列化的原因！

Your JSON entity is an array rather than a single object. This is why JSON.NET is crying about your deserialization!

将此JSON反序列化为IEnumerable<T>，您将解决问题:

Deserialize this JSON as an IEnumerable<T> and you'll solve your issue:

IEnumerable<CardSet> result = JsonConvert.DeserializeObject<IEnumerable<CardSet>>(jsonText);