Calling datas from another form?

i have 3 form . In the first form there is login for duty after duty login the system , in the second form student must enter. In the 3rd form i want the student name and surname must seen . There are 2 labels in the 2nd form , one is for student's name the other is for student's surname.How can i call them to the 3rd form?

1) Pass as arguments
2) Use public properties

magos, i tried to do something, did the ad and soyad variables public in the frmOgrenciGiris.cs form.

Code:

---

        private string ad;
        public string AD
        {
            get { return ad; }
        }

        private string soyad;
        public string SOYAD
        {
            get { return soyad; }
        }

---

Code:

---

                    ad = readerSel.GetString(readerSel.GetOrdinal("s_rname"));
                    soyad = readerSel.GetString(readerSel.GetOrdinal("s_surname"));

                        lblad.Text = ad;
                        lblsoyad.Text = soyad;

---

and i assigned the lblad adn lblsoyad to the ad and soyad

after that i call them in another form

Code:

---

public partial class frmAna : Form
    {
        public frmPersonelGiris MainForm;
        frmOgrenciGiris MainOgr = new frmOgrenciGiris();

public void frmAna_Load(object sender, EventArgs e)
        {
            lblAd.Text = MainOgr.AD;
            lblSoyad.Text = MainOgr.SOYAD;
}

---

but lblAd.Text and lblSoyad.Text did not appear in the form
what can i do now?