using System;
using System.Drawing;
using System.Windows.Forms;
   
class WidePolyline: Form
{
     public static void Main()
     {
          Application.Run(new WidePolyline());
     }
     public WidePolyline()
     {
   
          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)
     {
          Pen pen = new Pen(clr, 25);
   
          grfx.DrawLines(pen, new Point[] {
                         new Point( 25, 100), new Point(125, 100),
                         new Point(125,  50), new Point(225,  50),
                         new Point(225, 100), new Point(325, 100) });
     }
}

    

   
 


using System;
using System.Drawing;
using System.Windows.Forms;
   
class FourByFours: Form
{
     public static void Main()
     {
          Application.Run(new FourByFours());
     }
     public FourByFours()
     {
          Text = "Four by Fours";
          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)
     {
          Pen   pen   = new Pen(clr);
          Brush brush = new SolidBrush(clr);
          

          grfx.FillEllipse(brush, new Rectangle(14, 8, 4, 4));
     }
}

    

   
 

using System;
using System.Drawing;
using System.Windows.Forms;
   
class FourByFours: Form
{
     public static void Main()
     {
          Application.Run(new FourByFours());
     }
     public FourByFours()
     {
          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)
     {
          Pen   pen   = new Pen(clr);
          Brush brush = new SolidBrush(clr);
   
          grfx.FillRectangle(brush, new Rectangle(2, 8, 4, 4));
     }
}

    

   
 

using System;
using System.Drawing;
using System.Windows.Forms;
   
class FourByFours: Form
{
     public static void Main()
     {
          Application.Run(new FourByFours());
     }
     public FourByFours()
     {
          Text = "Four by Fours";
          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)
     {
          Pen   pen   = new Pen(clr);
          Brush brush = new SolidBrush(clr);
          
          grfx.FillRectangles(brush, new Rectangle[] 
                                             {new Rectangle(8, 8, 4, 4)});

     }
}

    

   
 

using System;
using System.Drawing;
using System.Windows.Forms;
   
class TryOneInchEllipse: Form
{
     public static void Main()
     {
          Application.Run(new TryOneInchEllipse());
     }
     public TryOneInchEllipse()
     {
          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)
     {
          grfx.DrawEllipse(new Pen(clr), 0, 0, grfx.DpiX, grfx.DpiY);
     }
}

    

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;

class FillModesClassical : Form {
public static void Main() {
Application.Run(new FillModesClassical());
}
public FillModesClassical() {
ResizeRedraw = true;
ClientSize = new Size(2 * ClientSize.Height, ClientSize.Height);
}
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) {
Brush brush = new SolidBrush(clr);
Point[] apt = new Point[5];

for (int i = 0; i < apt.Length; i++) { double dAngle = (i * 0.8 - 0.5) * Math.PI; apt[i] = new Point( (int)(cx * (0.25 + 0.24 * Math.Cos(dAngle))), (int)(cy * (0.50 + 0.48 * Math.Sin(dAngle)))); } grfx.FillPolygon(brush, apt, FillMode.Alternate); } } [/csharp]

   
 
using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
   
class KeyholeClip: Form
{
     protected Image        image;
     protected GraphicsPath path;
   
     public static void Main()
     {
          Application.Run(new KeyholeClip());
     }
     public KeyholeClip()
     {
          ResizeRedraw = true;
          image = Image.FromFile("Color.jpg");
   
          path = new GraphicsPath();
          path.AddArc(80, 0, 80, 80, 45, -270);
          path.AddLine(70, 180, 170, 180);
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          pea.Graphics.SetClip(path);
          pea.Graphics.DrawImage(image, 0, 0, image.Width, image.Height);
     }      

}