private void checkOutButton_Click(object sender, EventArgs e)
{
CustomerCheckOut form = new CustomerCheckOut(Model);
form.Dock = DockStyle.Fill;
form.MdiParent = this.MdiParent;
form.Show();
form.WindowState = FormWindowState.Maximized;
}
private void button7_Click(object sender, EventArgs e)
{
CustomerCheckOut customerCheckOut = new CustomerCheckOut(Model);
customerCheckOut.Dock = DockStyle.Fill;
customerCheckOut.MdiParent = this.MdiParent;
customerCheckOut.Show();
customerCheckOut.WindowState = FormWindowState.Maximized;
}