using System; using System.Drawing; using System.Drawing.Drawing2D; using System.Windows.Forms; class SquareTile: Form { const int iSide = 50; // Side of square public static void Main() { Application.Run(new SquareTile()); } public SquareTile() { ResizeRedraw = true; } protected override void OnPaint(PaintEventArgs pea) { DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height); } protected void DoPage(Graphics grfx, Color clr, int cx, int cy) { Point[] apt = {new Point(0, 0), new Point(iSide, 0), new Point(iSide, iSide), new Point(0, iSide)}; PathGradientBrush pgbrush = new PathGradientBrush(apt, WrapMode.TileFlipXY); pgbrush.SurroundColors = new Color[] { Color.Red, Color.Lime, Color.Blue, Color.White}; grfx.FillRectangle(pgbrush, 0, 0, cx, cy); } }