Set ResizeRedraw property
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)));
}
}
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