C#中如何对数组进行深复制

using System;
using System.IO;
using System.Runtime.Serialization.Formatters.Binary;

namespace ArraySample
{
    [Serializable]   //标识Number类为可序列化
    class Number
    {
        public int Num{get;set;}
        public override string ToString()
        {
            return string.Format("数值为:{0}",Num);
        }
 
    }
    
    class CopySample
    {
        public static void PrintArray(Number [] Numbers)
        {
            foreach(Number number in Numbers)
            {
                Console.WriteLine(number);
            }
            Console.WriteLine();
        }
        

        public static void Main(string[] args)
        {
            Number[] array1 = new Number[4];
            int[] array2 = new int[4]{1,2,3,4};
            for(int i=0;i<array1.Length;i++)
            {
                array1[i] = new Number{Num = 10 *(i+1)};
            }
            Console.WriteLine("数组array1的元素：");
            PrintArray(array1);
            
            MemoryStream ms = new MemoryStream();//序列化
            BinaryFormatter bf = new BinaryFormatter();
            bf.Serialize(ms,array1);
            ms.Position = 0;
            
            Number[] array3 = (Number[])bf.Deserialize(ms);  //反序列化
            for(int i = 0;i<array3.Length;i++)
            {
                array3[i].Num=20 *(i+1);
            }
            Console.WriteLine("对数组array3进行重新赋值后array3的元素：");
            PrintArray(array3);
            Console.WriteLine("对数组array3进行重新赋值后array1的元素：");
            PrintArray(array1);
            
            Console.Write("Press any key to continue . . . ");
            Console.ReadKey(true);
        }
        
    }
}