Форма появляется позади окон, как исправить?

this.BringToFront();

using Dolinay;
namespace USBWriter
{
    public partial class test : Form
    {
        private DriveDetector driveDetector = null;
 
        public test()
        {
            InitializeComponent();
            driveDetector = new DriveDetector(); // - вот виновник. 
        }

        public DriveDetector()
        {
            DetectorForm  frm = new DetectorForm(this);
            frm.Show(); // will be hidden immediatelly
            Init(frm, null);
        }

    /// The easiest way to use DriveDetector. 
        /// It will create hidden form for processing Windows messages about USB drives
        /// You do not need to override WndProc in your form.
        /// </summary>
 
        public DriveDetector()
        {
            DetectorForm  frm = new DetectorForm(this);
            frm.Show(); // will be hidden immediatelly
            Init(frm, null);
        }
 
        /// <summary>
        /// Alternate constructor.
        /// Pass in your Form and DriveDetector will not create hidden form.
        /// </summary>
        /// <param name="control">object which will receive Windows messages. 
        /// Pass "this" as this argument from your form class.</param>
 
        public DriveDetector(Control control)
        {
            Init(control, null);
        }

        protected override void OnShown(EventArgs e)
        {
            base.OnShown(e);
            Activate();
        }