Winforms – In TableLayoutPanel if Dock = Fill and AutoSize = true then last column/row occupy all remaining space

What about this code?

private void button1_Click(object sender, EventArgs e)
{
    var control = sender as Control;

    if(control == null)
        return;

    if (1 == tableLayoutPanel1.GetRowSpan(control))
    {
        tableLayoutPanel1.SetRowSpan(control, 2);
    }
    else
    {
        tableLayoutPanel1.SetRowSpan(control, 1);
    }
}

While adding b3.BringToFront() (after it has been added to Controls) works, the simplest solution here, is to simply change the order in which the buttons are added to Controls. The following code works perfectly:

Button b1 = new Button() { Text = "Button 1", Dock = DockStyle.Top };
Button b2 = new Button() { Text = "Button 2", Dock = DockStyle.Top };
Button b3 = new Button() { Text = "Button 3", Dock = DockStyle.Fill };

Controls.Add(b3);    // this guy first!
Controls.Add(b1);
Controls.Add(b2);

The result:

If you take a close look at the borders in this little example, this actually seems to work better than BringToFront().