private void button1_Click(object sender, EventArgs e) { int privilege = controllerObj.CheckPassword(textBox1.Text, textBox2.Text); if (privilege == 1) { ManagerForm ChildForm = new ManagerForm(); this.Hide(); ChildForm.Show(); } else if (privilege == 2) { CashierPersonForm ChildForm = new CashierPersonForm(); this.Hide(); ChildForm.Show(); } else if (privilege == 3) { ChefForm ChildForm = new ChefForm(); this.Hide(); ChildForm.Show(); } else if (privilege == 4) { SupervisorForm childform = new SupervisorForm(); this.Hide(); childform.Show(); } else { MessageBox.Show("Please enter a correct Username and Password"); } }