c#中常会涉及到一些类，List的深度拷贝。

 public object Clone(object ldc)
        {
            BinaryFormatter Formatter = new BinaryFormatter();
            MemoryStream stream = new MemoryStream();
            Formatter.Serialize(stream, ldc);
            stream.Position = 0;
            object clonedObj = Formatter.Deserialize(stream);
            stream.Close();
            return clonedObj;
        }