//LogIn button private void btnLogIn_Click(object sender, EventArgs e) { try { var isValid = LoginRepo.Validation(this.txtUsername.Text, this.txtPassword.Text); var userType = UserRepo.GetUserType(this.txtUsername.Text); if (isValid) { this.Visible = false; if (userType == "Admin") { new AdminForm().Show(); } else if (userType == "Manager") { new ManagerForm().Show(); } else if (userType == "Employee") { new SalesmanForm().Show(); } } else { MessageBox.Show("Invalid Username or Password"); } } catch (Exception error) { MessageBox.Show("Invalid Username or Password\n" + error.Message); } }