C#画笔Pen绘制自定义线的帽子

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 pen1 = new Pen(Color.Blue, 12);
      pen1.EndCap = LineCap.Custom;
      pen1.CustomEndCap = new AdjustableArrowCap(5f, 5f, true);
      Graphics g1 = this.CreateGraphics();
      g1.DrawLine(pen1, 10, 100, 100,100);
    }
  }
}