private void LoginAccount(string log, string pass) { if (MasterAccount(log, pass)) { MasterWindow masterWindow = new MasterWindow(login.Text); masterWindow.Show(); this.Close(); } else if (CustomerAccount(log, pass)) { CustomerWindow customerWindow = new CustomerWindow(login.Text); customerWindow.Show(); this.Close(); } else if (AdminAccount(log, pass) || AdminAccount(login.Text, password.Password)) { AdminWindow adminWindow = new AdminWindow(); adminWindow.Show(); this.Close(); } else { MessageBox.Show("Неправильное имя пользователя или пароль"); } }