using System;
class IndexerClass
{
    private int[] myArray = new int[10];
    public int this[int index] //indexer declaration
    {
        get
        {
            if (index < 0 || index >= 100)
                return 0;
            else
                return myArray[index];
        }
        set
        {
            if (!(index < 0 || index >= 100))
                myArray[index] = value;
        }
    }
}
public class MainClass
{
    public static void Main()
    {
        IndexerClass  b =new IndexerClass ();
        b[3] =256;
        b[5] = 1024;
        for (int i=0;i<=5;i++)
        {
            Console .WriteLine ("Element # {0} = {1}",i,b[i]);
        }
    }
}