private void btnMuayene_Click(object sender, EventArgs e)
        {
            Hasta_Ekle hst = new Hasta_Ekle();

            hst.Show();
            this.Hide();
        }
        private void btnHastaKabul_Click(object sender, EventArgs e)
        {
            Hasta_Ekle hs = new Hasta_Ekle();

            hs.Show();
            Form4 f = new Form4();

            f.Hide();
        }