public class CustomDateTimeConverter : JavaScriptDateTimeConverter

    {

        /// <summary>

        /// 重写JavaScriptDateTimeConverter ReadJson 方法

        /// </summary>

        /// <param name="reader">The <see cref="T:Newtonsoft.Json.JsonReader"/> to read from.</param>

        /// <param name="objectType">Type of the object.</param>

        /// <param name="existingValue">The existing property value of the JSON that is being converted.</param>

        /// <param name="serializer">The calling serializer.</param>

        /// <returns></returns>

        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)

        {

            if (reader.Value == null) //兼容可空时间类型

            {

                return null;

            }

            else

            {

                if (reader.TokenType == JsonToken.Date)

                {

                    return reader.Value;

                }

                else if (reader.TokenType == JsonToken.String)

                {

                    DateTime dt = DateTime.Parse(reader.Value.ToString());

                    return dt;

                }

                else

                {

                    return new DateTime(, , , , , , DateTimeKind.Utc).AddMilliseconds(Convert.ToInt64(reader.Value)).ToLocalTime();

                }

            }

        }

    }

var model = JsonConvert.DeserializeObject<ResponseModel>(res,new CustomDateTimeConverter());