private void loginButton_Click(object sender, EventArgs e) { if (statusLabel.Text == "Connected") { if (usernameTextBox.Text != "" && passwordTextBox.Text != "") { Tuple <bool, bool> login = network.login(usernameTextBox.Text, passwordTextBox.Text); if (login.Item1) { Form form = new FormClient(network, login.Item2, usernameTextBox.Text.ToLower()); this.Hide(); if (form.ShowDialog() == DialogResult.Cancel) { this.Dispose(); } } else { MessageBox.Show("Wrong username or password"); } } else { MessageBox.Show("Please enter a username and a password!"); } } }