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 Form11 : Form
  {
    public Form11()
    {
      InitializeComponent();
    }
    private void button1_Click(object sender, EventArgs e)
    {
      Pen pen = new Pen(Color.Blue, 12);
      pen.EndCap = LineCap.DiamondAnchor;
      Graphics g = this.CreateGraphics();
      g.DrawLine(pen, 10, 50, 100, 50);
    }
  }
}