private void pictureBox3_Click(object sender, EventArgs e)
        {
            this.Hide();
            ManageNotAvailableLocation back = new ManageNotAvailableLocation();

            back.Show();
        }
        private void pictureBox1_Click(object sender, EventArgs e)
        {
            ManageNotAvailableLocation ml = new ManageNotAvailableLocation();

            ml.Show();
        }