C#自定义的方法实现堆栈类设计

public class Clist
{
    private readonly List<int>? myList;
 
    public Clist()
    {
        myList = [];
    }
 
    public void Add(int item)
    {
        myList!.Add(item);
    }
 
    public void RemoveAt(int item)
    {
        myList!.RemoveAt(item);
    }
 
    public void Clear()
    {
        myList!.Clear();
    }
 
    public int Count()
    {
        return myList!.Count;
    }
 
    public void Display()
    {
        for (int i = myList!.Count - 1; i >= 0; i--)
        {
            int item = myList[i];
            Console.Write(item + " ");
        }
        Console.WriteLine();
    }
}

 public class CStack
 {
     private readonly Clist mylist;
 
     public CStack()
     {
         mylist = new Clist();
     }
 
     public void Push(int item)
     {
         mylist.Add(item);
     }
 
     public void Pop()
     {
         mylist.RemoveAt(mylist.Count() - 1);
     }
 
     public int Count()
     {
         return mylist.Count();
     }
 
     public void Display()
     {
         mylist.Display();
     }
 }

class Program
{
    static void Main(string[] args)
    {
        ArgumentNullException.ThrowIfNull(args);
 
        CStack stack = new();
 
        stack.Push(10);
        stack.Push(20);
        stack.Push(30);
        Console.WriteLine("堆栈数量={0}", stack.Count());
        stack.Display(); // 输出：30 20 10
 
        stack.Pop();
        stack.Pop();
        Console.WriteLine("堆栈数量= {0}", stack.Count());
        stack.Display(); // 输出：10
    }
}