/// <summary>

         /// 深度COPY

         /// </summary>

         /// <typeparam name="T"></typeparam>

         /// <param name="obj"></param>

         /// <returns></returns>

         public static T DeepClone<T>(T obj)

         {

             T objResult;

             using (MemoryStream ms = new MemoryStream())

             {

                 BinaryFormatter bf = new BinaryFormatter();

                 bf.Serialize(ms, obj);

                 ms.Position = ;

                 objResult = (T)bf.Deserialize(ms);

             }

             return objResult;

         }