I'm very new to windows form coding and I'm trying to make a minipaint which has three buttons (circle,rectangle and line) and when it gets a button as an input , it will draw the shape in panel.
I have this shape class

```
class shape
{ 
   public Color color { get; set; }
   public int width { get; set; }
   public int startx { get; set; }
   public  int starty { get; set; }
}

```

which has color,width and start position properties.then I have this rectangle class for example:

```
class rectangle : shape
{
    int length { get; set; }
    int width { get; set; }  
}

```

which inherits the share properties from the shape class. now I want to print a rectangle in panel . I'm familiar with `DrawRectangle` method and I printed a rectangle as bellow:

```
Pen black = new Pen(Color.Black);
Rectangle rect = new Rectangle(20,20,400,200);
private void panel1_Paint(object sender, PaintEventArgs e)
{
    Graphics g = e.Graphics;
    g.DrawRectangle(black, rect);
}

```

but I don't know how to draw a rectangle from `class rectangle:shape`. I'm also having problem with assigning value from click button to rectangle.
can you please help me?