Simple length-limited stack

CircularStack.cs

namespace kwd.gist {
    using System.Collections.Generic;
    public class CircularStack<T>
    {
        private readonly int _max;
        private readonly List<T> _items = new List<T>();
        
        public CircularStack(int max)
        {
            _max = max;
        }
        
        public void Push(T newItem)
        {
            _items.Insert(0, newItem);

            if(_items.Count >= _max){ _items.RemoveAt(_items.Count-1);}
        }

        public IReadOnlyList<T> Items => _items;
    }
}