How to CenterParent a non-modal form

Question

I have a non-modal child form which opens up from a parent form. I need to center the child form to its parent form. I have set property of child form to CenterParent<

Answer 1

It seems really weird that Show(this) doesn't behave the same way as ShowDialog(this) w.r.t form centering. All I have to offer is Rotem's solution in a neat way to hide the hacky workaround.

Create an extension class:

public static class Extension
{
    public static Form CenterForm(this Form child, Form parent)
    {
        child.StartPosition = FormStartPosition.Manual;
        child.Location = new Point(parent.Location.X + (parent.Width - child.Width) / 2, parent.Location.Y + (parent.Height - child.Height) / 2);
        return child;
    }
}

Call it with minimal fuss:

var form = new Form();
form.CenterForm(this).Show();