using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.Drawing.Drawing2D;namespace WindowsApplication2{  public partial class Form10 : Form  {    public Form10()    {      InitializeComponent();    }    GraphicsPath get(Rectangle rect, int radius)    {      int diameter = 2 * radius;      Rectangle arcrect = new Rectangle(rect.Location, new Size(diameter, diameter));      GraphicsPath path = new GraphicsPath();      path.AddArc(arcrect, 180, 90);      arcrect.X=rect.Right-diameter;      path.AddArc(arcrect, 270, 90);      arcrect.Y = rect.Bottom - diameter;      path.AddArc(arcrect, 0, 90);      arcrect.X = rect.Left;      path.AddArc(arcrect, 90, 90);      path.CloseFigure();      return path;    }    private void button1_Click(object sender, EventArgs e)    {      Graphics g = this.CreateGraphics();      int width = this.ClientRectangle.Width;      int height = this.ClientRectangle.Height;      Rectangle rect = new Rectangle(10, 10, width - 20, height - 20);      GraphicsPath path = get(rect, width / 10);      g.FillPath(Brushes.Red, path);      g.DrawPath(Pens.Yellow, path);    }  }}