using System;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        ParamsExample p = new ParamsExample();

        p.PassParams("1", "2", "3");

        p[9] = 1212;

        p[1] = 10;

        p.PrintIndexerItems();

    }

}

​

public class ParamsExample

{

    private int[] _param = new int[10];

    public int this[int param]

    {

        get

        {

            return _param[param];

        }

​

        set

        {

            _param[param] = value;

        }

    }

​

    public void PassParams(params string[] a)

    {

    }

    public void PrintIndexerItems()

    {

        foreach(var i in _param)

        {

            Console.Write($"{i}, ");

        }

    }

}