How do you set the StartPosition of a Windows Forms form using code?

Question

Is there a way to set the StartPosition of a Windows Forms form using code? It seems whatever I try results in the StartPostion being the default.

Here is what I am

Answer 1

To center on parent for the .Show call, this is what I had to do:

childForm.Location = new Point(
    (parentForm.Location.X + parentForm.Width / 2) - (childForm.Width / 2), 
    (parentForm.Location.Y + parentForm.Height / 2) - (childForm.Height / 2));
childForm.StartPosition = FormStartPosition.Manual;