draw simply a rectangle on canvas

Question

I am newbie of C# and WPF.

I want to draw simply a rectangle on canvas .

but I could not find the variable which decide origin point of rectangle .

    void DrawRect(int x, int y) 
    {
        Rectangle rec = new Rectangle
        {
            Fill = new SolidColorBrush(Colors.Red),
            Width = width,
            Height = y
            ...???
        };
        mainWindow.canvas.Children.Add(rec);
    }

Thank you for your help.

Answer 1

The Canvas' SetTop , SetLeft , SetRight , SetBottom properties should work.

So then

mainWindow.canvas.SetLeft(rec, xcoord);
mainWindow.canvas.SetTop(rec, ycoord);

Thanks to JerKimball for a little more information:

Individual shapes in WPF don't have a "Position", per se - they are positioned by setting the corresponding attached properties on the parent Canvas element