深度复制也不行，在线等。谢了

Question

   class City 
    {
       public int[] man=new int[2];
        public int population = 10;
       Country newCountry;       public City(Country newCountry)
       {
           this.newCountry = newCountry;
       }
                    public void Step()
        {
           man[0] = 10;
           population = 20;
        }
    }
 class Country:ICloneable
    {
        public City[] Cities;        public Country(int index)
        {
            Cities =new City[index];
        }        public object  Clone()
        {
            Country newCountry = new Country(this.Cities.Length);
            for (int i = 0; i < this.Cities.Length; i++)
            {
                newCountry .Cities[i]=this.Cities [i];            }
            return newCountry;
        }
    }
 class Program
    {
        static void Main(string[] args)
        {
            Country country1 = new Country(1);
            country1.Cities[0] = new City(country1 );
           
            Country tempCoutry;
            tempCoutry = (Country)country1.Clone();         
         
            tempCoutry.Cities[0].Step();
        }
    }
    //  tempCountry 变，  country1就变了， 搞不懂，等浅度复制时问题一致

Answer 1

因为你的City 也是引用类型

Answer 2

class Country:ICloneable 
{ 
public City[] Cities;  public Country(int index) 
{ 
Cities =new City[index]; 
}  public object  Clone() 
{
Country newCountry = new Country(this.Cities.Length); 
for (int i = 0; i  < this.Cities.Length; i++) 
{
newCountry.Cities[i] = new City(this);
newCountry.Cities[i].population = this.Cities [i].population;
newCountry.Cities[i].man[0] = this.Cities[i].man[0];
newCountry.Cities[i].man[1] = this.Cities[i].man[1];
} 
return newCountry; 
} 
}