using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace Graphics1
{
	/// This is the first grahics example from class on 7/9/07.
	/// This program does some simple drawing when Button1 is clicked.
	/// The drawing is not persistent--it disappears if the program
	/// is minimized or covered by something else and then uncovered.
	/// Button2 also demonstrates the lack of persistence by invalidating
	/// all or part of the image (depending on which line you use). When
	/// this happens, there is nothing to redraw the image.

	public partial class Form1 : Form
	{
		public Form1()
		{
			InitializeComponent();
		}
		private void button1_Click(object sender, EventArgs e)
		{
			Graphics g = this.CreateGraphics();
			Pen p = new Pen(Color.Blue, 5);
			g.DrawRectangle(p, 10, 10, 250, 250);
			p.Dispose(); //We should call Dispose since we created the Pen and
			g.Dispose(); //Graphics object
		}
		private void button2_Click(object sender, EventArgs e)
		{
			// Invalidate();
			Invalidate(new Rectangle(0, 0, 100, 100));
		}
	}
}