1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:
25:
26:
27:
28:
29:
30:
31:
32:
33:
34:
35:
36:
37:
38:
39:
40:
41:
42:
43:
44:
45:
46:
47:
48:
49:
50:
51:

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

        private Point m_ptLocation;

        public Point Location
        {
            get { return m_ptLocation; }
            set { m_ptLocation = value; }
        }

        List<Rectangle> m_lstRects = new List<Rectangle>();

        private void picOutput_Paint(object sender, PaintEventArgs e)
        {
            foreach (Rectangle r in m_lstRects)
            {
                new Rectangle(Location.X, Location.Y, 50, 50);
            }
            lblStatus.Text = m_lstRects.Count.ToString();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Graphics g = picOutput.CreateGraphics();
            Pen p = new Pen(Brushes.Blue);
            g.DrawRectangle(p, 100, 100, 50, 50);

            Rectangle r = new Rectangle();
            Random rand = new Random();
            r.Location = new Point(rand.Next(100, 300), rand.Next(100, 300));
            m_lstRects.Add(r);

            picOutput.Invalidate();
        }
    }
}