public void Refresh() { var g = panel1.CreateGraphics(); g.Clear(panel1.BackColor); foreach (var item in shapes) { if (item is rectangle) { rectangle r = (rectangle)item; r.Draw(g); } else if (item is circle) { circle c = (circle)item; c.Draw(g); } else if (item is ellipse) { ellipse e = (ellipse)item; e.Draw(g); } else if (item is line) { line l = (line)item; l.Draw(g); } else if (item is polygon) { polygon p = (polygon)item; p.Draw(g); } } }
private void button2_Click(object sender, EventArgs e) { circle c = new circle { r = 34, x = 30, y = 40, thickness = 1, color = Color.LightSkyBlue, fillcolor = Color.Orange, }; propertyGrid1.SelectedObject = c; shapes.Add(c); Refresh(); }