您的 JSON 实体是一个数组而不是单个对象.这就是 JSON.NET 为你的反序列化而哭泣的原因！

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，您将解决您的问题:

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

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