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; g.FillRectangle(Brushes.White, this.ClientRectangle); Pen p = new Pen(Color.Black, 1); p.DashStyle = DashStyle.Dash; g.DrawLine(p, 3, 3, 100, 3); p.Dispose(); } public static void Main() { Application.Run(new Form1()); } }