/// <summary> /// Multithreading Login /// </summary> private void GoogleButton_Click() { GoogleButton.Invoke(new Action(() => GoogleButton.BackColor = Color.Transparent)); if (userCreator.GoogleLogin()) { GoogleButton.Invoke(new Action(() => GoogleButton.BackColor = Color.LightGreen)); CreateNewUserButton.Invoke(new Action(() => CreateNewUserButton.Enabled = true)); CalendarsBox.Invoke(new Action(() => CalendarsBox.Enabled = true)); NewCalendarBox.Invoke(new Action(() => NewCalendarBox.Enabled = true)); } else { GoogleButton.Invoke(new Action(() => GoogleButton.BackColor = Color.OrangeRed)); } }