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);
     }
}

    

   
 

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
   
class TriangleTile: Form
{
     const int iSide = 50;         // Side of square for triangle
     MenuItem  miChecked;
   
     public static void Main()
     {
          Application.Run(new TriangleTile());
     }
     public TriangleTile()
     {
          ResizeRedraw = true; 
   
          Menu = new MainMenu();
          Menu.MenuItems.Add("&Wrap-Mode");
   
          foreach (WrapMode wm in Enum.GetValues(typeof(WrapMode)))
          {
               MenuItem mi = new MenuItem();
               mi.Text     = wm.ToString(); 
               mi.Click   += new EventHandler(MenuWrapModeOnClick);
               Menu.MenuItems[0].MenuItems.Add(mi);
          }
          miChecked = Menu.MenuItems[0].MenuItems[0];
          miChecked.Checked = true;
     }
     void MenuWrapModeOnClick(object obj, EventArgs ea)
     {
          miChecked.Checked = false;
          miChecked = (MenuItem) obj;
          miChecked.Checked = true;
          Invalidate();
     }
     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(0,     iSide)};
   
          PathGradientBrush pgbrush = 
                    new PathGradientBrush(apt, (WrapMode) miChecked.Index);
   
          grfx.FillRectangle(pgbrush, 0, 0, cx, cy);
     }
}

    

   
 

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

class BouncingGradientBrushBall : Form {
    public static void Main() {
        Application.Run(new BouncingGradientBrushBall());
    }
    public BouncingGradientBrushBall() {
        ResizeRedraw = true;
    }
    protected override void OnPaint(PaintEventArgs pea) {
        GraphicsPath path = new GraphicsPath();
        Rectangle rect = new Rectangle(10, 10, 30, 30);
        path.AddEllipse(rect);

        PathGradientBrush pgbrush = new PathGradientBrush(path);
        pgbrush.CenterPoint = new PointF((rect.Left + rect.Right) / 3,
                                         (rect.Top + rect.Bottom) / 3);
        pgbrush.CenterColor = Color.White;
        pgbrush.SurroundColors = new Color[] { Color.Red };

        pea.Graphics.FillRectangle(pgbrush, rect);
    }
}

    

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

class StarGradientBrush: Form
{
public static void Main()
{
Application.Run(new StarGradientBrush());
}
public StarGradientBrush()
{
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[5];

for (int i = 0; i < apt.Length; i++) { double dAngle = (i * 0.8 - 0.5) * Math.PI; apt[i] = new Point( (int)(cx * (0.50 + 0.48 * Math.Cos(dAngle))), (int)(cy * (0.50 + 0.48 * Math.Sin(dAngle)))); } PathGradientBrush pgbrush = new PathGradientBrush(apt); pgbrush.CenterColor = Color.White; pgbrush.SurroundColors = new Color[1] { Color.Black }; grfx.FillRectangle(pgbrush, 0, 0, cx, cy); } } [/csharp]

   
 


using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
   
class TriangleGradientBrush: Form
{
     public static void Main()
     {
          Application.Run(new TriangleGradientBrush());
     }
     public TriangleGradientBrush()
     {
          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(cx,  0),
                           new Point(cx, cy),
                           new Point(0,  cy) };
   
          PathGradientBrush pgbrush = new PathGradientBrush(apt);
   
          grfx.FillRectangle(pgbrush, 0, 0, cx, cy);
     }
}

    

   
 
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Drawing2D;

using System.Text;
using System.Windows.Forms;

public class Form1 : Form {

    protected override void OnPaint(PaintEventArgs e) {
        Graphics g = e.Graphics;
        GraphicsPath gp = new GraphicsPath();

        gp.AddLine(10, 10, 110, 15);
        gp.AddLine(110, 15, 100, 96);
        gp.AddLine(100, 96, 15, 110);
        gp.CloseFigure();

        g.FillRectangle(Brushes.White, this.ClientRectangle);
        g.SmoothingMode = SmoothingMode.AntiAlias;

        PathGradientBrush pgb = new PathGradientBrush(gp);
        pgb.CenterColor = Color.White;
        pgb.SurroundColors = new Color[] { Color.Blue };
        g.FillPath(pgb, gp);

        g.DrawPath(Pens.Black, gp);
        pgb.Dispose();
        gp.Dispose();
    }
    public static void Main() {
        Application.Run(new Form1());
    }
}

    

   

       
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

public class TestGDI2 : System.Windows.Forms.Form{
    
    //in order to paint something OnPaint method needs to be overridden
    
    protected override void OnPaint(System.Windows.Forms.PaintEventArgs pe) {
        //OnPaint method is a member of Form class 
        //The following call sends pe to an event listener Graphics
        base.OnPaint(pe);
        
        Graphics g = pe.Graphics;
        g.FillRectangle(new SolidBrush(Color.White), ClientRectangle);
        GraphicsPath path = new GraphicsPath(new Point[] {
        new Point(40, 140), new Point(275, 200),
        new Point(105, 225), new Point(190, 300),
        new Point(50, 350), new Point(20, 180), },
        
        new byte[] {
            (byte)PathPointType.Start,
            (byte)PathPointType.Bezier,
            (byte)PathPointType.Bezier,
            (byte)PathPointType.Bezier,
            (byte)PathPointType.Line,
            (byte)PathPointType.Line,
        });

        PathGradientBrush pgb = new PathGradientBrush(path);
        pgb.SurroundColors = new Color[] { Color.Green,Color.Yellow,Color.Red, 
                                            Color.Blue,Color.Orange, Color.White, 
                                          };
        g.FillPath(pgb, path);
    }
    public static void Main() {
        System.Windows.Forms.Application.Run(new TestGDI2());//display form
    }
}