private void button4_Click(object sender, EventArgs e)
        {
            this.Hide();
            RoomInformation rr = new RoomInformation();

            rr.Show();
        }
 private void button4_Click(object sender, EventArgs e)
 {
     this.Hide();
     Patient.RoomInformation ii = new Patient.RoomInformation();
     ii.Show();
 }