Spring – Rev 1

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using System.Collections.Generic;

namespace Spring.Utilities.Collections
{
    public class IndexedList<T> : List<T>
    {
#region Public Enums, Properties and Fields

        public T Forward
        {
            get
            {
                if (++Top >= Count)
                {
                    --Top;
                }

                var lastItem = base[Top];

                return lastItem;
            }
        }

        public T Back
        {
            get
            {
                if (--Top < 0)
                {
                    Top = 0;
                }

                var lastItem = base[Top];

                return lastItem;
            }
        }

#endregion

#region Private Delegates, Events, Enums, Properties, Indexers and Fields

        private int Top { get; set; }

#endregion

#region Public Methods

        public new void Add(T combos)
        {
            base.Add(combos);

            Top = Count - 1;
        }

#endregion
    }
}