using System; using System.Drawing; using System.Windows.Forms; class RandomClearResizeRedraw: Form { public static void Main() { Application.Run(new RandomClearResizeRedraw()); } public RandomClearResizeRedraw() { ResizeRedraw = true; } protected override void OnPaint(PaintEventArgs pea) { Graphics graphics = pea.Graphics; Random rand = new Random(); graphics.Clear(Color.FromArgb(rand.Next(256), rand.Next(256), rand.Next(256))); } }