FModel/FModel/Framework/NavigationList.cs

using System.Collections.Generic;

namespace FModel.Framework;

public class NavigationList<T> : List<T>
{
    private int _currentIndex;
    public int CurrentIndex
    {
        get
        {
            if (_currentIndex > Count - 1)
            {
                _currentIndex = Count - 1;
            }

            if (_currentIndex < 0)
            {
                _currentIndex = 0;
            }

            return _currentIndex;
        }
        set => _currentIndex = value;
    }

    public T MoveNext
    {
        get
        {
            _currentIndex++;
            return this[CurrentIndex];
        }
    }

    public T MovePrevious
    {
        get
        {
            _currentIndex--;
            return this[CurrentIndex];
        }
    }

    public T Current => this[CurrentIndex];
}