private void ProductRegistry_Load(object sender, EventArgs e) { ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT SerialNumber FROM Win32_BaseBoard"); foreach (ManagementObject MySerial in searcher.Get()) { string bserial = MySerial.GetPropertyValue("SerialNumber").ToString(); txtcopycode.Text = AesCrypt.Encrypt(bserial); } ProductRegistry pf = new ProductRegistry(); }