Square Tile

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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);
     }
}

    


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