using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace newArray
{
    class Program
    {
        static void Main()
        {
            rangeofarray arr = new rangeofarray(-5, 15);
            int j = 7;
            for (int i = -5; i < 15; i++)
            {
                arr[i] = j;
                j++;
            }
            Console.WriteLine(arr[-4]);
        }

    }
}





using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace newArray
{
    class rangeofarray
    {
        private int minIndex;
        private int maxIndex;
        private int[] array;
        public rangeofarray(int minIndex, int maxIndex)
        {
            this.minIndex = minIndex;
            this.maxIndex = maxIndex;
            array = new int[maxIndex - minIndex + 1];
        }

        public int this[int index]
        {
            get
            {
                return array[index - minIndex];
            }
            set
            {
                array[index - minIndex] = value;
            }
        }
    }
}