using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; public class Form1 : Form { protected override void OnPaint(PaintEventArgs e) { Graphics g = e.Graphics; g.FillRectangle(Brushes.White, this.ClientRectangle); Color c1 = Color.FromArgb(100, Color.Blue); Color c2 = Color.FromArgb(50, Color.Green); g.FillEllipse(Brushes.Red, 20, 20, 80, 80); g.FillRectangle(new SolidBrush(c1), 60, 80, 60, 60); Point[] pa = new Point[] { new Point(150, 40), new Point(90, 40), new Point(90, 120)}; g.FillPolygon(new SolidBrush(c2), pa); } public static void Main() { Application.Run(new Form1()); } }