using System;

using System.Collections;

using System.Collections.Generic;

public class Program

{

    public class MyGenericArray<T>

    {

        private T[] array;

        public MyGenericArray(int size)

        {

            array = new T[size];

        }

        public T Getitem (int index)

        {

            return array[index];

        }

        public T Setitem(int index , T value)

        {

            return array[index] = value;

        }

    }

    public static void Swap<R>(ref R val1, ref R val2)

        {

            R temp;

            temp = val1;

            val1 = val2;

            val2 = temp;

        }

    public static void Main()

    {

        Console.WriteLine("Hello World");

        MyGenericArray<int> myarray = new MyGenericArray<int>(5);

        for(int i=0; i <5;i++)

        {

            myarray.Setitem(i,i+1);

        }

        for(int i=0; i <5;i++)

        {

            Console.WriteLine(myarray.Getitem(i));

        }

        MyGenericArray<char> strarray = new MyGenericArray<char>(5);

        for (int i=0; i < 5; i++)

        {

            strarray.Setitem(i,(char)(i+97));

        }

        for (int i=0; i <5; i++)

        {

            Console.WriteLine(strarray.Getitem(i));

        }

        int a =10;

        int b =20;

        string s1 = "Anita";

        string s2 = "prasad";

        Swap<int>(ref a,ref b);

        Console.WriteLine("Swapped values are {0}, {1}", a,b);

        Swap<string>(ref s1,ref s2);

        Console.WriteLine("Swapped values are {0}, {1}", s1,s2);

    }

}