using System;
 
public class Test
{
	public static void Main()
	{
        int[] a = { 1, 2, 3, 4 };
        int[] b = a;
		for (int i = 2; i < a.Length - 1; i++)
        {
            a[i] = a[i + 1];
        }
        Array.Resize(ref a, a.Length - 1);
        foreach(var item in a)
        {
           Console.Write(item.ToString() + ", ");
        }
        Console.WriteLine();
        foreach(var item in b)
        {
           Console.Write(item.ToString() + ", ");
        }
        Console.WriteLine();
	}
}

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