Array.Copy C#, C# - rextester

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            // Instantiate the source array.
           int[] source = new int[5];
            source[0] = 1;
            source[1] = 2;
            source[2] = 3;
            source[3] = 4;
            source[4] = 5;
            //
            // Instantiate and allocate the copy array.
            //
            int[] copy = new int[source.Length];
            //
            // Copy the source to the copy array.
            //
            Array.Copy(source, copy, source.Length);

// change one of the source eleement
            source[3] = 0;
		
            // Find the original value of the changed element
            for(int i=0; i < copy.Length; i++)
            {
                if(source[i] != copy[i]) Console.WriteLine(copy[i]);
            }	
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,14 sec, absolute running time: 0,09 sec, cpu time: 0,08 sec, average memory usage: 13 Mb, average nr of threads: 3