private void btn_Login_Click(object sender, EventArgs e) { string email = txb_LoginEmail.Text; string password = txb_LoginPassword.Text; bool result1 = my.UserChecking(email, password); if (result1) { if (my.AdminChecking()) { SelectForm selectForm = new SelectForm(); selectForm.ShowDialog(); } else { AdminSelectForm adminSelectForm = new AdminSelectForm(); adminSelectForm.ShowDialog(); } } else { MessageBox.Show("Wrong!"); } }