C#的箭头画法

可以用Pen(画笔)的StartCap和EndCap定义箭头的起止形状，再用DrawLine画出

private void Form1_Paint(object sender, PaintEventArgs e)
{
     Graphics g = e.Graphics;
     g.SmoothingMode = SmoothingMode.AntiAlias;
     g.FillRectangle(Brushes.White, this.ClientRectangle);

     Pen p = new Pen(Color.Black, 10);
     p.StartCap = LineCap.Round;
     p.EndCap = LineCap.ArrowAnchor;
     g.DrawLine(p, 30, 30, 80, 30);
     p.Dispose();
}