using System;

public class Program

{

    public static void Main()

    {

        int[] array = new int[0];

        Array.Resize(ref array,array.Length+1);

        array[0]=  10;

        Array.Resize(ref array,array.Length+1);

        array[1]=  12;

        Array.Resize(ref array,array.Length+1);

        array[2]=  15;

        Array.Resize(ref array,array.Length+1);

        array[3]=  3;

        for(int index=0; index < array.Length; index++)

            Console.Write("\t{0}",array[index]);

    }

}