using System;

namespace Example

{

    class IndexedProperty<TIndexer,TValue>

    {

        protected readonly Func<TIndexer,TValue> _getter;

        protected readonly Action<TIndexer,TValue> _setter;

​

        public IndexedProperty(Func<TIndexer,TValue> getter, Action<TIndexer,TValue> setter)

        {

            _getter = getter;

            _setter = setter;

        }

​

        public TValue this[TIndexer parameter]

        {

            get 

            {

                return _getter(parameter);

            }

            set

            {

                _setter(parameter, value);

            }

        }

    }

​

    class Foo

    { 

        private short[] _backingStore = new short[10];

        public IndexedProperty<short, short> MyProperty

        { 

            get

            {

                return new IndexedProperty<short,short>

                (

                    getter: key => 

                    {

                        return _backingStore[key];  

                    },

                    setter: (key, val) =>

                    {

                        _backingStore[key] = val;

                    }

                );

            }

        }

    }

​

​

    public class Program

    {

        public static void Main()

        {

            var foo = new Foo();

            foo.MyProperty[5] = 3;

            Console.WriteLine(foo.MyProperty[5]);

        }

    }

}