C#의 List 개체의 전체 복사 문제에 대한 간략한 토론

List<T> oldList = new List<T>();
oldList.Add(..);
List<T> newList = new List<T>(oldList);

static class Extensions
 {
     public static IList<T> Clone<T>(this IList<T> listToClone) where T: ICloneable
     {
         return listToClone.Select(item => (T)item.Clone()).ToList();
     }
 //当然前题是List中的对象要实现ICloneable接口
 }

public static T Clone<T>(T RealObject)
 
{
   using (Stream objectStream = new MemoryStream())
   {
      //利用 System.Runtime.Serialization序列化与反序列化完成引用对象的复制
       IFormatter formatter = new BinaryFormatter();
       formatter.Serialize(objectStream, RealObject);
       objectStream.Seek(0, SeekOrigin.Begin);
       return (T)formatter.Deserialize(objectStream);
   }
}

public static T Clone<T>(T RealObject)
{
      using(Stream stream=new MemoryStream())
      {
        XmlSerializer serializer = new XmlSerializer(typeof(T));
        serializer.Serialize(stream, RealObject);
        stream.Seek(0, SeekOrigin.Begin);
        return (T)serializer.Deserialize(stream);
      }
}