如何从MDI parent中的最大化子项禁用自动生成的标题栏？

private void MDIParent_Load(object sender, EventArgs e)
{
    foreach (Control control in this.Controls)
    {
        if (control is MdiClient)
        {
            control.Paint += new PaintEventHandler(MdiClient_Paint);
            break;
        }
    }
}

private void MdiClient_Paint(object sender, PaintEventArgs e)
{
    Control control = (Control)sender;
    e.Graphics.DrawString("", control.Font, Brushes.Black, 0, 0);
}

private void ChildForm_Load(object sender, EventArgs e)
{
    this.MaximizeBox = false;
}