C#构造josn格式

Question

  public class JsonHelper
    {        /// <summary>
        /// JSON序列化(二进制方式，实体类使用[Serializable])
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="t"></param>
        /// <returns></returns>
        public static string JsonSerializerIO<T>(T t)
        {
            DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T));
            using (MemoryStream ms = new MemoryStream())
            {
                ser.WriteObject(ms, t);
                string jsonString = Encoding.UTF8.GetString(ms.ToArray());
                ms.Close();
                return jsonString;
            }
        }        /// <summary>
        /// JSON反序列化(二进制方法，实体类使用[Serializable])
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="jsonString"></param>
        /// <returns></returns>
        public static T JsonDeserializeIO<T>(string jsonString)
        {
            DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T));
            using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(jsonString)))
            {
                T obj = (T)ser.ReadObject(ms);
                return obj;
            }
        }