using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
//Graphicsオブジェクトの作成
Graphics g = pictureBox1.CreateGraphics();
//Penオブジェクトの作成(幅3黒色)
Pen p = new Pen(Color.Black, 3);
//(0,0)-(100,100)に線を引く
g.DrawLine(p, 0, 0, 100, 100);
//リソースを開放する
p.Dispose();
g.Dispose();
        }
    }
}