要反序列化Dictionary内容中的对像类型键值，需要实现自定义转换器：XXXJsonConverter :JsonConverter

 

public class xxxJsonConverter : JsonConverter    {         public override bool CanWrite {            get {                return false;            }        }        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)        {            throw new NotImplementedException();        }        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)        {            string valu = reader.Path;            JsonToken jt = reader.TokenType;            // Load JObject from stream            if (jt== JsonToken.Null)                return null;            JObject jObject = JObject.Load(reader);            Type targetType;            JToken typeStr;            //JToken varl;            if (!jObject.TryGetValue("_t", out typeStr))            {                targetType = objectType;            }            else            {                var scrName = typeStr.ToString();                if (scrName.Contains("."))                {                    scrName = scrName.Substring(scrName.LastIndexOf(".", StringComparison.Ordinal) + 1);                }                targetType = PropertyHintTypeForStr(scrName);            }            // Displaying output.             var target = Activator.CreateInstance(targetType);            serializer.Populate(jObject.CreateReader(), target);            Dictionary
     
       vtmp = new Dictionary
      
       ();            foreach (string key in ((PiItem)target).Keys)            {                if(((PiItem)target).FieldValues[key] is JObject)                {                    vtmp.Add(key, JsonConvert.DeserializeObject
       
        (((PiItem)target).FieldValues[key].ToString()));                }            }            foreach (KeyValuePair
        
          kv in vtmp)            {                ((PiItem)target)[kv.Key] = kv.Value;            }            return target;        }        public override bool CanConvert(Type objectType)        {            return objectType == typeof(PiItem);        }        private Type PropertyHintTypeForStr(string typeStr)        {            Type result;            switch (typeStr)            {                case nameof(PiItem):                    result = typeof(PiItem); break;                case nameof(ComplexItem):                    result = typeof(ComplexItem); break;                default:                    result = null; break;            }            return result;        }    }