private void btnYeniKayit_Click(object sender, EventArgs e)
{
DavaKayitGuncelleme frm = new DavaKayitGuncelleme();
frm.Show();
}
private void btnDuzenle_Click(object sender, EventArgs e)
{
DavaKayitGuncelleme frm = new DavaKayitGuncelleme((int)lstDava.FocusedItem.Tag);
frm.Show();
}