private void LoginButton_Click(object sender, EventArgs e) { Rank loggedInRank = reservationSystem.Login(UsernameTextBox.Text, PasswordTextBox.Text); if (loggedInRank == Rank.Manager) { this.Hide(); var mainPage = new MainPage_Manager(reservationSystem); mainPage.Closed += (sender2, args) => this.Close(); mainPage.Show(); } else if (loggedInRank == Rank.Salesman) { this.Hide(); var mainPage = new MainPage_Salesman(reservationSystem); mainPage.Closed += (sender2, args) => this.Close(); mainPage.Show(); } }