public void ChangeState(States st)
        {
            LoginPanel.Hide();
            NewUserPanel.Hide();
            MainMenuPanel.Hide();

            state = st;
            if (state == States.Login)
            {
                LoginPanel.Show();
            }
            if (state == States.NewUser)
            {
                NewUserPanel.Show();
            }
            if (state == States.MainMenu)
            {
                MainMenuPanel.Show();
            }
        }
 private void Login_NewUserBtn_Click(object sender, EventArgs e)
 {
     state = States.NewUser;
     LoginPanel.Hide();
     NewUserPanel.Show();
 }