using System;

public class Program

{

    public static void Main()

    {

        Char [] foo = {'a','b','c','d','e'};

        Char [] bar = {'w','x','y','z'};

        Array.Copy(bar, foo, 2);

        Console.WriteLine(foo);

        Console.WriteLine(bar);

        bar[Array.IndexOf(foo,'e')] = 'f';

    }

}