using System;
using System.Drawing;
using System.Collections.Generic;
 
public class Test
{
	public static void Main() {
        Point[] arr = { new Point(10, 20), new Point(20, 40), new Point(40, 80) };

        arr[1].X = 30;

        foreach (var pt in arr) {
			Console.WriteLine(pt);
		}
 
	}
}