using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Drawing.Drawing2D;
public class Form1 : System.Windows.Forms.Form {
[STAThread]
static void Main() {
Application.Run(new Form1());
}
protected override void OnPaint(PaintEventArgs e) {
Graphics g = e.Graphics;
Font f = new Font(new FontFamily("Times New Roman"), 10);
Brush fb = new SolidBrush(Color.Black);
GraphicsPath gp;
PathGradientBrush pGB;
Rectangle rec;
Color cR = Color.Red, cW = Color.White, cY = Color.Yellow;
int w = 100, h = 70;
g.DrawString("Center", f, fb, 10, 5);
gp = new GraphicsPath();
rec = new Rectangle(10, 20, w, h);
gp.AddRectangle(rec);
pGB = new PathGradientBrush(gp);
pGB.CenterPoint = new Point(10 + w / 2, 20 + h / 2);
pGB.CenterColor = cR;
pGB.SurroundColors = new Color[1] { cW };
g.FillRectangle(pGB, rec);
g.DrawString("Center - 2 x 2 Colors", f, fb, w + 20, 5);
gp = new GraphicsPath();
rec = new Rectangle(20 + w, 20, w, h);
gp.AddRectangle(rec);
pGB = new PathGradientBrush(gp);
pGB.CenterPoint = new Point(w + 20 + w / 2, 20 + h / 2);
pGB.CenterColor = cR;
pGB.SurroundColors = new Color[4] { cW, cY, cW, cY };
g.FillRectangle(pGB, rec);
g.DrawString("LefTopCenter", f, fb, 10, h + 25);
gp = new GraphicsPath();
rec = new Rectangle(10, h + 40, w, h);
gp.AddRectangle(rec);
pGB = new PathGradientBrush(gp);
pGB.CenterPoint = new Point(10, h + 40);
pGB.CenterColor = cR;
pGB.SurroundColors = new Color[1] { cW };
g.FillRectangle(pGB, rec);
g.DrawString("Top", f, fb, w + 20, h + 25);
gp = new GraphicsPath();
rec = new Rectangle(w + 20, h + 40, w, h);
gp.AddEllipse(rec);
pGB = new PathGradientBrush(gp);
pGB.CenterPoint = new Point(w + 20 + w / 2, h + 40);
pGB.CenterColor = cR;
pGB.SurroundColors = new Color[1] { cW };
g.FillRectangle(pGB, rec);
g.Dispose();
fb.Dispose();
}
}