c#：如何处理对对象进行深度拷贝

 /// <summary>
         /// 对对象进行深度拷贝
         /// </summary>
         /// <param name="obj"></param>
         /// <returns></returns>
         private object Clone(object obj)
         {
             MemoryStream memory_stream = new MemoryStream();
             BinaryFormatter formatter = new BinaryFormatter();

             formatter.Serialize(memory_stream,obj);
             memory_stream.Position = ;

             return formatter.Deserialize(memory_stream);
         }