C sharp - Reconocer dispositivos conectados a puertos usb con Csharp

public partial class Form1 : Form

{

    private DriveDetector driveDetector = null;

    public Form1()

    {

        InitializeComponent();

        driveDetector = new DriveDetector();

        driveDetector.DeviceArrived += new DriveDetectorEventHandler(

            OnDriveArrived);

        driveDetector.DeviceRemoved += new DriveDetectorEventHandler(

            OnDriveRemoved);

        driveDetector.QueryRemove += new DriveDetectorEventHandler(

   }            OnQueryRemove);

}

private void OnDriveArrived(object sender, DriveDetectorEventArgs e)

{

    e.HookQueryRemove = true;

}

private void OnDriveRemoved(object sender, DriveDetectorEventArgs e)

{

    // TODO: do clean up here, etc. Letter of the removed drive is in

    // e.Drive;

}

private void OnQueryRemove(object sender, DriveDetectorEventArgs e)

{

     if (MessageBox.Show("Allow remove?", "Query remove",

        MessageBoxButtons.YesNo, MessageBoxIcon.Question) ==

            DialogResult.Yes)

        e.Cancel = false;

        e.Cancel = true;

}

driveDetector = new DriveDetector(this);

protected override void WndProc(ref Message m)

{

    base.WndProc(ref m);        // call default p

    if (driveDetector != null)

    {

        driveDetector.WndProc(ref m);

    }

}